Chapter 30: Rate Locks: When to Lock, Float-Down Options, Lock Extensions, and the Market Risk You Manage Daily

"A lock is not a prediction. It is the moment you stop making one." — constructed; the discipline this chapter is about

Overview

Here is the decision, and it arrives on almost every file you will ever take.

The borrower is on the phone. The appraisal is not back. Underwriting has not seen the file. Somebody on the radio this morning said the Federal Reserve is expected to cut rates. Your borrower has heard that, has done the arithmetic in their head, and is asking you a question that sounds simple: should we lock, or should we wait?

There is no correct answer to that question. There is a decision made under uncertainty with somebody else's money, on a calendar somebody else set, and you are going to be held responsible for it either way. If you lock and the market improves, you will be the person who cost them money. If you float and the market moves against them, you will be the person who cost them money, and this time it will be the version that shows up in their payment for thirty years. Every loan officer who has been in this business more than a year has had both conversations.

What you are actually being asked for is not a forecast. It is a structure: how much time is genuinely left, how much of this file is done, what this household can absorb if it moves, and what happens on the day the lock expires with the loan still open. Get that structure right and the lock decision becomes a manageable, documentable, defensible piece of work. Get it wrong and you will discover — as the Linden Street file is about to discover — that the cheapest lock on the rate sheet was never the cheapest lock on the file.

Chapter 29 built this loan's rate from the ground up: base price, adjustments, the shape of the sheet. That chapter owns how the number is made. This chapter owns when you take it, how long you take it for, and what it costs when the calendar runs out before the file does. Chapter 28 established where the money is and how it moves. You need both, because a rate lock is not a promise a lender makes out of goodwill. It is an option the lender has written, and somebody on a trading desk hedged it the same afternoon you took it.

In this chapter, you will learn to:

• Explain what a lock actually is — an option, with a price, an expiration, and a counterparty
• Frame the lock decision honestly, without making a prediction you cannot make
• Size a lock against the purchase contract rather than against your optimism
• Explain what moves mortgage rates intraday, and why the federal funds rate is not it
• Handle a mid-day reprice and the 9:00 quote that no longer exists at 11:00
• Evaluate float-downs, extensions, relocks, and worst-case pricing in dollars
• Answer "who pays?" when a lock expires, including when the answer is you

Learning Paths

🎓 Exam — §30.1, §30.4, and §30.7. The SAFE test cares about what a lock is, what happens at expiration, and the distinction between the federal funds rate and long-term mortgage rates. Know that a lock is not an approval. 🏠 New LO — §30.2, §30.3, and §30.9. §30.3 is the most expensive lesson in this chapter and §30.9 is the conversation you will have this week. 🤝 Partner — §30.3 and §30.5. If you are a real estate agent, §30.3 explains why your lender asks about the closing date before quoting, and §30.5 explains why a rate quoted this morning can vanish before lunch. 📊 Operations — §30.7, §30.8, and §30.10. Extensions, cures, and fallout are where lock decisions become somebody's profit-and-loss line.

30.1 What a lock actually is

A rate lock is a lender's binding commitment to deliver a specific interest rate at a specific price, on a specific loan, for a specific period of time — provided the loan closes inside that period and the facts that priced it do not change.

Read that sentence again and count the specifics, because every one of them is load-bearing.

A specific rate. 6.625%, not "about six and a half."

A specific price. On the Linden Street file, 0.500 discount point, which is \$1,828.75. The rate and the price travel together and always have. Chapter 29 explains why; for now it is enough to know that "locked at 6.625%" is half a sentence, and a loan officer who says it without the price attached has told the borrower nothing they can rely on.

A specific loan. Program, term, loan amount, property address, occupancy, property type, and the borrowers' credit profile. Change any of them and you have changed the thing that was priced. A borrower who decides to put 10% down instead of 5% has not simply improved the file — they have changed the loan-to-value ratio, which is one of the inputs Chapter 29 used to build the price, and the lock must be re-worked. This surprises borrowers, who reasonably assume that improving the file cannot cost them anything.

A specific period, ending on a specific day. This is the one that gets people, and it is where this chapter spends most of its energy.

The lock is an option, and the lender wrote it

Here is the framing that makes the rest of the chapter obvious, and it comes straight out of Chapter 28.

When you lock a borrower, the lender has handed them something with real economic value: the right, but not the obligation, to borrow \$365,750 at 6.625% for the next thirty days. If rates rise, the borrower exercises — they close, and they get a below-market loan. If rates fall, the borrower is under no meaningful compulsion to close with you at all. They can go find the better rate somewhere else, and some of them will.

That is a one-sided instrument. In any other market it would be called an option, it would have a visible premium, and the person receiving it would write a check for it. In mortgage lending the borrower does not write that check, because the premium is built into the price of the loan.

The lender, meanwhile, has just taken on a real market position. It has promised to deliver a loan at a fixed yield, and it does not yet own that loan — the appraisal is not back and the underwriter has not looked at the file. So the secondary desk hedges: it sells forward in the to-be-announced market, in the manner Chapter 28 describes, so that if rates rise between now and closing, the gain on the hedge roughly offsets the loss on the promise.

Three consequences follow immediately, and they explain nearly everything a lock desk does.

First, locks have prices. A rate quoted "locked" and a rate quoted "floating" are not the same quote, because one of them includes an option and the other does not.

Second, longer locks cost more. A sixty-day option is more valuable than a thirty-day option, for exactly the reason a longer insurance policy costs more than a shorter one: more time is more opportunity for the market to move. Chapter 29 shows where that adjustment appears on the sheet. §30.3 is about what it should have been on this file.

Third — and this is the one new loan officers never see coming — a borrower who walks away costs the lender money even though nothing was ever lent. The hedge was placed. If the market moved while the file was open and the loan never funds, the desk has to unwind a position that no longer has anything behind it. That is fallout, and §30.10 is about the fact that your lock desk is keeping score.

THE LIFE OF A LOCK                                  [constructed teaching example]

   loan officer requests ──► LOCK DESK confirms ──► CONFIRMATION issued
                                    │                      │
                                    │                the countdown starts
                          hedge placed in the             │
                          forward market (Ch. 28)         │
                                                          ▼
                                          ┌───────────────────────────────┐
                                          │  the file works: appraisal,   │
                                          │  underwriting, conditions     │
                                          └───────────────┬───────────────┘
                                                          │
              ┌───────────────────────────┬───────────────┴─────────────────┐
              ▼                           ▼                                 ▼
      CLOSES IN THE WINDOW        LOCK EXPIRES                     BORROWER WALKS
      lock delivered, hedge       extension (a fee) or             FALLOUT — the hedge
      lifts against a real loan   relock at WORST-CASE             is now naked and the
      everyone is fine            somebody pays — §30.7            desk unwinds it — §30.10

What a lock is not

A lock is not an approval. This is the single most common borrower misunderstanding in this chapter and it is a favorite of the exam. On day 12 the Linden Street file was locked at 6.625%. It had no underwriting decision, no appraisal, and eleven conditions it had not yet been given. A lock says what the money costs if the loan is made. It says nothing about whether the loan will be made.

A lock is not a guarantee the borrower will close. It binds the lender's price. It does not bind the borrower to anything.

A lock is not portable to a different house. If the transaction dies and the borrowers write an offer on a different property, most lock policies treat that as a new loan. Some lenders will transfer a lock; many will not, or will only at current market. Read your lock policy before you promise otherwise.

A lock is not a shield against changed facts. If the representative credit score drops, if the loan amount changes, if the appraised value comes in under contract and the loan-to-value ratio moves, the pricing inputs have changed and the lock is re-priced accordingly. Chapter 29 owns which inputs do that.

📄 Read the File

text FIGURE 30.1 — "The lock confirmation nobody reads" [the Linden Street file] THE DOCUMENT Rate lock confirmation, generated by the lock desk and delivered to the loan officer on day 12. One page. Not a consumer disclosure — an internal commitment document between the lender's secondary desk and the file. THE CONTEXT Loan L-2214. A $385,000 purchase, 5% down, conventional 30-year fixed, $365,750, 95% LTV, 706 representative score, primary residence. The appraisal was ordered on day 7 and is not back. The file has not been submitted to underwriting. The executed purchase contract names a day-45 closing. WHAT IT SHOWS Locked rate 6.625%. Discount 0.500 point = $1,828.75. Lock period 30 days. Lock date day 12. EXPIRATION DAY 42. Product, loan amount, property address, occupancy, LTV, representative score, and lock period are all printed on the page, because every one of them priced the loan. Change one, re-price the lock. WHAT IT DOESN'T It does not say the loan is approved, because it is not. It does not say the borrowers will close. It does not say what happens if day 42 arrives with the file still open, beyond a one-line reference to the lender's lock policy. And it does not compare its own expiration date to the closing date in the purchase contract, because no system in this business does that for you. THE DECISION Read the expiration date out loud. Read the contract's closing date out loud. Subtract. On day 12 that subtraction returns NEGATIVE THREE. The decision available on day 12 is to re-lock the file for a longer period today, while the cost is small, disclosed, and chosen — rather than on day 42, when it will be larger, undisclosed, and forced. THE LESSON A lock confirmation is a countdown. The only number on it that matters is the one nobody checks against the purchase contract.

Constructed. Lock confirmation formats vary by lender; the figures are this book's frozen ones.

30.2 The lock decision, framed honestly

I am not going to give you a rule, because there isn't one, and every loan officer who has offered you one was either selling something or had been lucky recently.

Here is what is actually true. Nobody knows where rates are going. Not the economists whose full-time job is forecasting them, not the strategist on television, not your branch manager, and not the account executive who calls you every Tuesday with a market update. The bond market prices in the consensus expectation continuously; if a move were knowable, it would already be in the price. What you are choosing between is not "the good outcome" and "the bad outcome." It is two distributions of outcomes, and your borrower has to live inside whichever one shows up.

So the honest framing is not what will rates do? It is: what does being wrong cost this household in each direction, and how much time do we genuinely have?

The four inputs

1. How much time is genuinely left. Not how much time you feel like you have. Count from today to the contract's closing date, and then count the things that must happen in between that you do not control. §30.3 does this arithmetic properly. The general shape: the less time remains, the less floating buys you, because you are running out of runway to benefit from a move while the expiration risk is climbing.

2. How much of the file is done. Floating a file with a returned appraisal, a clean title commitment, and a conditional approval is a different act than floating a file where nothing has been verified. In the first case you are managing one variable. In the second you are managing five, and any of them can eat the calendar you were counting on.

3. What the borrower can absorb if it moves. This is where the lock decision stops being about rates and starts being about the file. On Linden Street the back-end debt-to-income ratio is 42.66% — obligations of \$4,479.72 against \$10,500.00 of qualifying monthly income. That number is not a cushion. Watch what a rate move does to it.

4. What the borrower will feel. Regret is asymmetric and you should be honest with yourself about it. A borrower who locks and then watches the market improve is mildly annoyed at the world. A borrower who floats on your encouragement and watches the market run away is angry at you, permanently, and tells people. That asymmetry is not a reason to manipulate anyone. It is a legitimate input into what this particular household can live with, and the right way to use it is to say it out loud: "if this goes the other way, how will you feel about the decision we made today?"

What a rate move does to this file's approval, not just its payment

Take the frozen rate/point grid this file was priced from and hold the cost constant at half a point. If the market moves, the rate you can buy for half a point moves with it. Here is what each row does to the borrower's payment and to the ratio the underwriter approved.

(Taxes \$385.00, insurance \$130.00, and mortgage insurance \$176.78 are constant across the rows; the mortgage insurance factor is driven by loan-to-value and score, not by the note rate. Other monthly debts are \$1,446.00. Income \$10,500.00. All figures from the frozen file.)

Each eighth of a point in rate is worth about \$30 a month on this loan, which is $\$30 \div \$10{,}500 = 0.29$ percentage points of back-end ratio. Running from 42.66% up to a 45% ceiling is 2.34 percentage points, or roughly eight eighths — about one full percentage point of rate.

One percentage point sounds like an ocean of room. It is not. The narrator of this book has worked through a cycle that moved the market from under three percent to over seven in nineteen months. A file with a hundred basis points of ratio headroom is a file that can be broken by an ordinary quarter of a bad year.

That is the honest answer to "how much can they absorb." Not a feeling. A number, computed off the grid, before the conversation.

⚖️ Compliance Check

You cannot predict rates, and if you say you can, you own it.

"Rates are going down, let's float" is not advice. It is a forecast, delivered by a licensed professional to a consumer who will reasonably rely on it, about a market nobody has ever reliably forecast. When it is wrong, you will not be able to point to a document that says you disclaimed it, because you did not.

Three concrete guardrails:

• Never state a future rate as a fact or a likelihood you can support. Describe scenarios and their dollar consequences. "If the market gives back a quarter, this payment goes to \$2,402.72" is a true statement about arithmetic. "The market is going to give back a quarter" is not a statement you are in a position to make.
• Never promise a rate you have not locked. An unlocked quote is today's pricing, and you should say the words today's pricing every single time.
• Your compensation may not vary with the terms of the transaction. Regulation Z's loan originator compensation rule is the reason, and Chapter 26 covers it in full. It matters here because it removes an argument a borrower might otherwise suspect: your paycheck does not get bigger if they take the higher rate.

Federal and state requirements change, unfair-or-deceptive-practice standards are enforced on the substance of what a consumer was led to believe rather than on your intent, and state law varies. Verify current requirements with your compliance department and your regulator.

Float with a written stop

If the borrower elects to float — which is a legitimate choice, not a failure — do not leave it as a mood. Convert it into a rule, in writing, on the day you make it:

FLOAT INSTRUCTION — the version that protects everyone
                                                  [constructed teaching example]

  We are floating. The following is agreed today and I will hold you to it:

  1. TARGET.   If 6.500% at half a point becomes available, we lock. No call,
               no discussion, no "let's see if it goes further." We lock.
  2. STOP.     If pricing worsens such that half a point no longer buys better
               than 6.875%, we lock IMMEDIATELY at whatever that is. We do not
               wait for it to come back.
  3. DEADLINE. Regardless of price, we lock no later than day 20, because the
               lock we need is 45 days and the contract closes on day 45.
  4. REACH.    You are reachable at this number between 8:00 and 5:00. If I
               cannot reach you when a threshold hits, I will lock and tell you.

  Borrower initials __________   Date __________

Every part of that document exists because of a specific failure. Item 1 exists because borrowers who hit their target get greedy. Item 2 exists because the instinct when a market moves against you is to wait for it to come back, and it is the single most expensive instinct in this business. Item 3 exists because the calendar does not care about the market. Item 4 exists because you will need a decision at 10:47 in the morning and the borrower will be in a meeting.

30.3 Lock periods and what they cost

A lock period is the number of days the lender's commitment stands. The common ones are 15, 30, 45, and 60 days; some lenders publish 75 and 90, and construction and new-build programs offer extended locks measured in months, priced accordingly.

Longer costs more. Always, structurally, for the option reason in §30.1. Chapter 29 shows you where that adjustment sits on the rate sheet and how it stacks with everything else. What Chapter 29 cannot do for you is tell you which period this file needs, because that is not a pricing question. It is a calendar question, and the calendar is yours.

The rule, stated once

Measure the lock from the day you lock to the purchase contract's closing date, then add a buffer for the things you do not control. Round up to the next available period. Never round down.

That is the whole rule, and it is not complicated. What makes it hard is that shorter locks price better and the file always feels like it is going to close early.

The Linden Street file got this wrong

On day 12 the loan officer locked a 30-day period. The contract named a day-45 closing. Subtract:

$$45 - 12 = 33 \text{ days that had to fit inside the lock}$$

A 30-day lock covers thirty of those thirty-three days. The lock was three days short the moment it was taken. Not three days short because the title work took longer than expected. Not three days short because the borrowers financed furniture on day 41. Three days short on day 12, arithmetically, before a single thing had gone wrong — and before any buffer at all was added for the things that always do.

There is no version of this file, however smoothly it ran, in which a 30-day lock taken on day 12 covers a closing on day 45. The only way that lock works is if the closing happens early, which requires the seller, the seller's agent, the closing agent, and everybody's schedule to cooperate with a date nobody agreed to. That is not a plan. That is a hope with a fee attached.

🧮 Run the Numbers

Sizing the lock that should have been taken on day 12.

```text SIZING THE LOCK [the Linden Street file, day 12]

Locking on ............................................. day 12 Contract's stated closing date ......................... day 45 ──────────────────────────────────────────────────────────────── Calendar days that MUST fit inside the lock ............ 33

Days available inside a 30-day lock .................... 30 SHORT BY ............................................... 3 <── before any buffer whatsoever

Then add the buffer, for the things you do not control: appraisal returns .................. day 16 (ordered day 7) title exceptions to clear .......... unknown on day 12 underwriting first decision ........ ~5 days after submission each condition round-trip .......... 1 to 4 days pre-closing refresh + final ........ 1 to 3 days Closing Disclosure, then THREE BUSINESS DAYS ... fixed by law weekends ........................... 2 days out of every 7 ──────────────────────────────────────────────────────────────── Minimum defensible lock on day 12 ...................... 45 days A 45-day lock taken day 12 expires .................... DAY 57 ```

Now price the mistake. Assume, for this example only, that the 45-day lock priced an eighth of a point worse than the 30-day. [Constructed lock-period increment — these vary by lender and by day; verify on your own rate sheet.]

	Points	Cost on \$365,750	Expires	Paid by	Disclosed?
45-day lock, taken day 12	0.125	\$457.19	day 57	borrower	yes, on the Loan Estimate
30-day lock + the extension it forced	0.250	\$914.38	day 57	lender	no — it appeared on day 42

The lock that was actually needed cost \$457.19**. The lock that was taken, plus the extension it made inevitable, cost **\$914.38 — exactly twice as much, and it bought exactly the same protection.

Look at the expiration dates. Day 12 plus 45 days is day 57. Day 42 plus the frozen 15-day extension is day 57. The extension purchased, on day 42, in a hurry, at double the price, precisely the lock that was available on day 12 for half the money.

For scale on this file: \$914.38 is **exactly half** of the \$1,828.75 the borrowers paid in discount to buy the rate down, and exactly a quarter of the \$3,657.50 origination charge. A calendar error cost half a discount point.

The temptation here is real and I want to name it rather than pretend it is beneath a professional. Shorter locks price better. When you quote a borrower, the 30-day number is the prettier number, and a competitor quoting off a 15-day sheet will look cheaper than you no matter what you do. There is a constant, structural pull toward buying the shortest lock you can plausibly justify and telling yourself the file will move fast.

It will not move fast. Files do not move fast. The appraisal takes the time appraisers take, the title company finds what title companies find, the underwriter has forty files, and the three-business-day Closing Disclosure clock is a matter of federal law that no amount of hustle compresses. Chapter 22 explains that clock; the only thing you need from it here is that it is not negotiable and it sits at the end of your calendar, not the middle.

⚠️ Where Deals Die

The lock sized against your optimism instead of against the contract.

The mechanism is always the same and it never looks like a mistake at the time. You are on day 12. The file feels good. The borrowers are responsive, the agent is competent, the appraisal is ordered. Somebody could close this in three weeks. So you take the 30-day lock, save the borrower a few hundred dollars, and quote a slightly better number than the lender down the street.

Then day 19 brings a mechanic's lien on the title commitment from a prior owner's roofing contractor. Nothing to do with your borrowers, nothing you could have prevented, and eleven days gone by the time it is released and re-recorded. Then the file sits between day 33 and day 44 while everyone assumes somebody else is moving it. Then the pre-closing refresh finds a debt from day 41. By the time anyone looks up, the lock expired two days ago.

The disciplined version takes ninety seconds on day 12. Open the purchase contract. Find the closing date. Subtract today. That is the minimum. Add a buffer for the appraisal, the title, one bad condition, and the three-business-day disclosure clock. Round up to the next available period. Then quote the borrower the honest cost of the lock they actually need, and say why:

"Your contract closes on day 45. A thirty-day lock expires three days before that, so I'm not taking it. The forty-five-day is a little more and it covers you with room. If we close early, great — nobody is upset about an unused week of a lock."

Nobody has ever complained about a lock that was too long. The complaint you will get is the other one, and it arrives on the worst possible day.

30.4 What moves mortgage rates intraday

A borrower is going to say this to you, probably this month: "I heard the Fed is cutting rates. Should I wait?"

If you cannot answer that clearly, you will spend your career losing arguments to cable news. If you can, you will have done one of the most genuinely useful things a loan officer can do for a household, and you will do it in ninety seconds.

The instrument, not the headline

Long-term fixed mortgage rates in the United States are set, day to day, by the price at which mortgage-backed securities trade in the forward market. Chapter 28 covers those securities and how a pool of loans becomes one. The only thing you need to carry forward from it is that the loans you originate end up inside securities, and that investors buy those securities at a price which implies a yield.

When investors are willing to pay more for that stream of payments, they are accepting a lower yield, and mortgage rates fall. When they demand a higher yield, they pay less, and mortgage rates rise.

WHY THE ARROW POINTS THE OTHER WAY               [constructed teaching example]

   MBS PRICE UP    ─────►  investors accept a LOWER yield  ─────►  RATES DOWN
   MBS PRICE DOWN  ─────►  investors demand a HIGHER yield ─────►  RATES UP

   New loan officers reverse this constantly, because "the market is up"
   sounds like good news and in this market it means your rate improved,
   not that rates went up. Say "prices are up, rates are down." Say it
   both ways every time until it is automatic.

What actually moves those prices

Broadly, and in rough order of how often you will see it matter:

Inflation data. A fixed-rate mortgage pays a nominal stream for thirty years. Inflation is the direct enemy of that stream, because it erodes what those future dollars buy. When an inflation report comes in hotter than the market expected, investors demand a higher yield to hold long-dated fixed-rate paper, and mortgage rates rise, sometimes within seconds of the release. In recent cycles this has been the single most reliable mover on the calendar.

Employment data. A strong labor market implies wage pressure, sustained demand, and a central bank in no hurry to ease — all of which push long yields up. The monthly employment report is a scheduled event and everyone in the bond market is watching the same clock.

Expectations about Federal Reserve policy — not the policy itself. More on this below, because it is the whole confusion.

Treasury supply and the benchmark long yield. Mortgage-backed securities are priced at a spread over comparable Treasury yields. When Treasury yields move, mortgage yields generally follow. But the spread itself moves too, which is why "the ten-year fell and my rate didn't" is a real thing your borrower will notice and a real thing you should be able to explain: the benchmark moved and the spread widened, and the net was nothing.

Prepayment expectations. When rates fall sharply, borrowers refinance, and investors holding a pool of high-rate loans get their money back early — into a market where they can only reinvest at the new lower rate. That prospect makes mortgage-backed securities rally less than Treasuries do in a big rally. It is the honest reason mortgage rates are sticky on the way down.

Flight to quality and geopolitical shock. Bad news in the world tends to push money into government bonds, dropping yields. Mortgage rates usually follow, imperfectly and with a lag.

Supply and demand in the securities themselves. Heavy origination volume means heavy new supply of securities, which pressures prices. Large-scale purchases or sales by a central bank move the same lever in the other direction.

The federal funds rate is not your rate

This is the part to memorize, because you will use it constantly.

The federal funds rate is the overnight rate at which banks lend reserves to one another. The Federal Open Market Committee sets a target for it at eight scheduled meetings a year. It is an overnight rate.

It directly and immediately drives short-term consumer borrowing: the prime rate, and therefore home equity lines of credit, credit cards, and much variable-rate consumer debt. Adjustable-rate mortgage indexes are more responsive to it than fixed rates are, because a short-term index tracks short-term money.

It does not set the thirty-year fixed mortgage rate. A thirty-year fixed rate reflects what investors require to hold a fixed stream of payments for years, which depends on their expectations about inflation and growth over that entire horizon. Those expectations move constantly, and they have usually already absorbed a widely anticipated policy move weeks before it happens.

Which produces the outcome that infuriates borrowers: mortgage rates can rise on the afternoon of a rate cut. Two ordinary mechanisms explain it. First, the cut was priced in — the market moved when the expectation formed, not when the announcement landed, so the announcement itself is a non-event and the commentary around it moves things instead. Second, an aggressive easing posture can raise the market's expectation of future inflation, and higher inflation expectations mean higher long-term yields. The short rate went down; the long rate went up. Both are entirely normal.

🎓 NMLS Exam Watch

Expect a question in roughly this shape: "The Federal Reserve lowers the federal funds rate. What is the most likely immediate effect on 30-year fixed mortgage rates?"

The tested answer is that there is no direct or automatic effect, because the federal funds rate is an overnight bank-to-bank rate while long-term mortgage rates are driven by the yields investors demand on mortgage-backed securities and long-term bonds. Distractors will offer "they fall by the same amount," "they fall by half as much," or "they fall the next business day." All three are wrong for the same reason.

A companion question tests the direction of the price/yield relationship: when bond prices rise, yields fall. Candidates under time pressure reverse this constantly. And a third variant asks which consumer product the federal funds rate does move — the answer is the prime-rate-indexed products: home equity lines, credit cards, and some short-term consumer credit.

The exam also likes the plain definitional trap: a rate lock does not obligate the borrower and is not a loan approval. It binds the lender's price.

Here is the script, compressed. A borrower says the Fed is cutting.

"That's a real thing and it will matter for your credit card. It doesn't set your mortgage rate. Your mortgage rate comes from what investors are paying today for mortgage bonds, and those prices move on inflation and jobs data, not on the overnight bank rate. I've seen mortgage rates go up on the day of a cut, because the cut was already expected and the bond market had moved weeks earlier. What I can tell you is what pricing is right now and what it costs you if it moves either way — do you want me to run that?"

That answer does three things at once. It takes the borrower seriously, it tells them something true they did not know, and it moves the conversation from a forecast you cannot make to arithmetic you can.

30.5 Repricing and the 10:30 problem

Your lender publishes a rate sheet in the morning. It reflects where securities were trading a few minutes before it was built. If prices move enough during the day, the lender issues a new sheet — a reprice — and the morning sheet is dead. Repricing can go either way; a reprice for the better is a real and pleasant thing. Most of the ones you will remember went the other way.

Do not let anyone sell you a statistic about how often this happens. There isn't a reliable published one, it varies enormously by lender and by market, and any number you are quoted is a snapshot of somebody's quiet week. What is true is structural: a rate you quoted at 9:00 is a rate that existed at 9:00.

A DAY ON THE LOCK DESK — the shape of it, not a schedule
                              [constructed; the desk's times are illustrative. The
                               market's times are not — check the release calendar.]

  ~7:00 a.m.  The desk prices the day and publishes the sheet to the sales force.
              It reflects where securities were trading a few minutes ago.

   8:30 a.m.  Most major federal economic releases land at 8:30 Eastern. Inflation
              and employment prints are here. The bond market reacts in seconds.
              Your rate sheet does not — it is still the 7:00 sheet.

   9:00 a.m.  You quote 6.625% at half a point. This is TRUE at 9:00.

  10:15 a.m.  Prices are sliding. The desk is watching a threshold, not a clock.

  10:47 a.m.  REPRICE FOR THE WORSE. New sheet issued. The 7:00 sheet is void.
              Anything not already locked prices off the new one.

  11:00 a.m.  Your borrower calls back to lock. The 9:00 rate does not exist.
              THIS is the conversation.

   2:00 p.m.  On the eight scheduled FOMC days a year, the statement generally
              lands at 2:00 Eastern with a press conference after. Many desks
              will not honor lock requests into that window.

  ~4-5 p.m.   LOCK CUTOFF. Requests after cutoff are worked the next morning at
              the next morning's price. Know your desk's cutoff by heart.

The practical rules

A lock is not locked until the desk confirms it. Not when you decide, not when the borrower says yes on the phone, not when you type it into the system. When the confirmation comes back. Until then you have a request.

Submit the request the moment you have authority. Not after lunch. The window between "the borrower said yes" and "the desk confirmed" is the window in which a reprice can happen, and it belongs to you.

Get authority in writing, and make it fast to give. A text message saying "lock it" is authority. A voicemail you have not heard yet is not. Tell borrowers on day one exactly how you want to receive that word.

Quote with an expiration attached, every time. "That's today's pricing and it's good until the sheet changes, which can happen mid-morning" is eleven extra words that will save you a dozen bad conversations a year.

Know your desk's cutoff and your desk's holiday calendar. The bond market closes early on some days that are ordinary business days for you. A lock request at 3:00 on one of those afternoons is a lock request for tomorrow.

Never blame the reprice for your delay. If you had authority at 9:15 and submitted at 11:30, the reprice is not what happened to the borrower. You are.

⚠️ Where Deals Die

The 9:00 quote and the 11:00 call.

You quoted 6.625% at half a point. The borrower talked to their spouse, called back at 11:00, and the sheet repriced at 10:47. The rate is gone.

The fatal answer: "No, no, we're fine, I locked you this morning." You did not, and on day 48 a Closing Disclosure will say so in writing. This is how licenses end. It is also, in its milder forms, how a loan officer acquires the habit of managing a borrower's feelings instead of their file.

The other fatal answer: silence. You quietly lock at the new number and hope nobody compares it to the text you sent at 9:04. They will compare it. Borrowers keep those texts.

What actually works is immediate, plain, and includes the dollars:

"I have to give you bad news before you hear it somewhere else. Pricing changed at 10:47 this morning — there was an inflation number at 8:30 and the bond market moved. The 6.625% I quoted you at nine o'clock is not on the sheet anymore. What is on the sheet right now is [current], which is \$X a month more than what we talked about. I'm sorry. I should have told you at nine that pricing holds until it doesn't. Here's the decision: we can lock this right now at the current number, or we can wait, and I can't tell you which way it goes. What I can tell you is that we need a forty-five-day lock either way, because your contract closes on day 45."

Then — and this is the part that separates the loan officers who survive their third year — you fix the process, not just the call. Quote with the expiration attached. Get lock authority in writing before you quote. Submit the second you have it.

30.6 Float-downs

A float-down is an option, written into a lock, that lets the borrower take some of a market improvement if one occurs before a stated deadline. The lock protects the borrower from a rise; the float-down gives back some of the upside they gave away by locking.

It sounds like a free lunch and it is not. Go back to §30.1. The lender has already written one option. A float-down is a second one, layered on top, and options cost money whether or not anyone hands you an invoice. A float-down is paid for either as an explicit fee or as a slightly worse initial rate — and if a lender tells you their float-down is free, the correct response is to compare their locked rate with and without it and find where the premium is hiding.

What they typically look like

Structures vary enormously by lender and by program, and I am deliberately not going to print a schedule, because any schedule I printed would be somebody's marketing and would be stale within a year. Verify the specific terms in your own lender's lock policy. The shape, however, is fairly consistent:

• A trigger threshold. The market must improve by at least some stated amount before the option can be exercised. This exists because otherwise every borrower would exercise on every one-basis-point wiggle and the desk could not hedge anything.
• One exercise. Once, not repeatedly. You do not get to ratchet down all the way to closing.
• A window. Typically opening only after the loan is approved and closing some number of days before the note date, because the desk needs time to re-hedge and the closer needs final figures.
• A cap or a share. The borrower may receive the full improvement, or a portion of it, or the improvement capped at some maximum. Read the document.
• A fee, or a worse starting point. See above.

There is also a second thing sometimes called a float-down that is not one: a market improvement policy, under which a lender may, at its discretion, re-price a locked loan when the market has moved dramatically in the borrower's favor. That is not an option the borrower holds. It is a business decision the lender makes to prevent fallout, and §30.10 explains exactly why they make it. Never describe a discretionary policy to a borrower as a right they have purchased.

🔍 Check Your Understanding

1. A lock and a float-down are both options. Who writes each one, and who holds it?
2. A lender advertises a "free float-down." Where is the premium?
3. Your borrower's float-down requires a 0.250% improvement to trigger and the market improves by 0.125%. What did the borrower get for their money?

(3 is the one to sit with: nothing. That is not a defect in the product, it is what an option is. Most float-downs are never exercised, which is precisely why a lender can afford to offer them. The right question is never "will this pay off?" — it is "would I pay this price to remove this risk, knowing that most of the time I get nothing?")

The honest evaluation

Price it like the option it is.

Suppose a float-down on the Linden Street file cost an eighth of a point — \$457.19 — and required a 0.250% market improvement to trigger. Now assume a constructed market improvement of 0.250% while the file was open. [Constructed market movement — illustrative only, not a forecast and not a historical claim.] At the same half point of cost, the borrower's rate goes from 6.625% to 6.375%:

$$\$2{,}341.94 - \$2{,}281.80 = \$60.14 \text{ per month}$$

$$\$457.19 \div \$60.14 = 7.6 \text{ months to recover the fee}$$

Seven and a half months. Under that constructed scenario the float-down was an excellent purchase. Under a scenario where the market moves a mere eighth, or moves against them, the same \$457.19 bought absolutely nothing — and that is the more common outcome, which is why the product exists and why lenders can sell it profitably.

So the test is not "will it trigger." You cannot know that; see §30.2. The test is: would this household pay \$457.19 today, in cash, to convert "we locked and we might feel foolish" into "we locked and we participate if it improves"? For a borrower who is genuinely losing sleep — and some are, and their sleep is a real thing — the answer can be yes on those terms alone. For a borrower who is simply hoping to win, the answer is usually no, and it is your job to say so out loud rather than sell them a lottery ticket with your name on it.

One more failure mode worth naming: the borrower who believes a float-down means "I get whatever the market does." They do not. They get one exercise, above a threshold, inside a window, possibly capped. If you sold the concept in a sentence and the document says something narrower, the day they find out is the day you lose the referral relationship behind them.

30.7 Extensions, relocks, and worst-case pricing

Day 42 arrives on the Linden Street file. The lock expires. The loan is not closed.

Now what?

There are three doors, and you should know the cost of all three before you ever walk through one.

Door 1 — the extension

A lock extension buys additional days at the same rate and price, for a fee. On this file the fee is frozen: a 15-day extension at 0.250 point = \$914.38, carrying the lock to day 57.

Extensions are usually priced per day or in blocks, and the pricing generally worsens with each successive extension — a second one costs more than the first, both because the desk's hedge is getting expensive and because a file extending twice is a file the desk has stopped believing in. Do not print or promise a schedule; get your lender's current one and keep it where you can see it.

Request the extension the day you know you need it, not the day it expires. This is a small discipline with a large payoff. A desk asked on day 38 for an extension it will need on day 42 is dealing with a professional. A desk asked at 4:45 p.m. on day 42 is dealing with an emergency, and emergencies get worst-case treatment.

Door 2 — the relock

A relock is a new lock taken after the old one expires. The rate and price come from the current sheet, subject to your lender's lock policy — and here is where the important concept lives.

Worst-case pricing means the borrower receives the worse of the original locked price and current market pricing at the time of the relock. Most lender lock policies apply it, and many add a cooling-off period before a relock is permitted at all.

That is asymmetric on purpose, and once you see why, you will stop experiencing it as unfair.

If expiration handed the borrower a free re-price at current market, then every lock would become a one-way bet with unlimited re-runs. Market improved? Let it expire and relock lower. Market worsened? Close inside the window and keep the old rate. The lender wrote one option (§30.1) and hedged one option. It cannot afford to write an infinite series of them, so the policy removes the upside from expiration.

WORST-CASE PRICING — why expiration is not a do-over
                                              [constructed teaching example]

  IF THE MARKET WORSENED    you get current market (the worse one)  → you lose
  IF THE MARKET IMPROVED    you get your original rate (the worse   → you gain
                            one) — the improvement does not pass       nothing
                            through

  Heads the desk wins, tails the desk does not lose. That is not the
  desk being difficult. It is the price of the fact that a lock is an
  option the borrower never paid a visible premium for.

Door 3 — let it die

Rarely correct, occasionally the only honest answer: the file is not going to close, the borrower is not going to perform, and continuing to pay for a lock on a dead transaction is pouring money into a hole. Tell the desk early. A desk that hears "this one is not closing" on day 30 can unwind the hedge in an orderly market. A desk that finds out on day 45 cannot.

🧮 Run the Numbers

Extension versus relock, in dollars — day 42 on the Linden Street file.

The extension is frozen: 0.250 point = \$914.38, buying 15 days.

Now compare it to a relock under worst-case pricing across three constructed market scenarios. [Constructed market movements — illustrative only. Not forecasts. Not historical claims.]

Scenario A — the market is a quarter point worse on day 42. At the same half point of cost, current market is 6.875%. Worst-case pricing takes the worse of the two, so the relock is 6.875%.

	Rate	P&I	vs. locked
Extend	6.625%	\$2,341.94	—
Relock (worst-case)	6.875%	\$2,402.72 | **+\$60.78/month**

$$\$60.78 \times 12 = \$729.36 \text{ per year}$$ $$\$60.78 \times 360 = \$21{,}880.80 \text{ over the full term}$$ $$\$914.38 \div \$60.78 = 15.0 \text{ months for the extension to pay for itself}$$

A one-time \$914.38 versus \$21,880.80 over the term. The extension is not close to a hard decision here — and this is the ordinary case, because extensions get requested in exactly the markets where relocking hurts.

Scenario B — the market is unchanged. Relock at 6.625%, which is also worst-case. The relock costs whatever the policy's relock fee is and buys the same rate; the extension costs \$914.38 and buys the same rate. Now you are comparing two fee schedules, not two rates, and you should read the lock policy rather than guess.

Scenario C — the market is a quarter point better on day 42. Current market at half a point would be 6.375%, \$2,281.80 — **\$60.14 a month less than the locked rate. Under worst-case pricing the relock still delivers 6.625%**. The improvement does not pass through. The extension does not deliver it either.

Scenario C is the one to think about hardest, because it is where borrowers get angry and where a loan officer who does not understand §30.1 will agree with them. The borrower's instinct is "the market is better, so I should get better." The answer is that they already received something for free — thirty days of protection against the other direction — and expiration is not a second free option. If your lender has a discretionary market-improvement policy (§30.6), day 42 is the day to ask about it, politely, once, with a clean file to show.

Sizing the extension

Extend for the days you actually need plus a buffer, using the same discipline as §30.3, because a second extension costs more than the first and looks worse to the desk. On this file the 15-day extension carried to day 57 and the loan closed on day 51 — six days of margin, which is exactly right. That is the one part of the day-42 response that was well executed.

30.8 Who pays when it is your fault

Now the question this chapter exists to answer honestly.

A lock expired. Somebody has to pay \$914.38. There are exactly three candidates.

The borrower. In principle, if the delay was genuinely theirs and the increase can be properly documented and re-disclosed. In practice this is much narrower than loan officers assume, and it is a disclosure question rather than a fairness question — which means it is governed by the tolerance rules, and Chapter 22 owns those. What matters here is the shape: an origination charge of this kind sits in the zero-tolerance category, and a lender that cannot document a valid changed circumstance may not simply pass an increase through because it feels justified. "The borrower was slow with a paystub" is a feeling. A valid changed circumstance is a documented event. They are not the same thing and only one of them survives an audit.

The lender. Absorbing the fee as a cure — issuing a lender credit that offsets the increase so the borrower's bottom line is unchanged. This is what happened on the Linden Street file.

The loan officer. Some shops will reduce an originator's commission to cover a pricing concession. Be very careful here. Regulation Z's loan originator compensation rule sharply restricts when originator compensation may vary or be reduced in connection with a transaction, and the narrow circumstances in which a reduction to cover an increase in closing costs is permitted are specific and conditioned. Chapter 26 covers that rule properly. Do not assume you are allowed to "just eat it," and do not let a branch manager tell you that you are without checking. Verify with your compliance department.

What happened on this file, and why

On day 42 the lock expired. A 15-day extension at 0.250 point = \$914.38** carried it to day 57. **The lender paid it, as a tolerance cure.** The borrowers' cash to close remained **\$25,376.34 — unchanged, exactly as it had been disclosed.

Why was that the right answer? Three reasons, and they stack.

First, there was no changed circumstance to document, because nothing changed. The contract's closing date was day 45 on day 12, when the lock was taken, and it was still day 45 on day 42. The lock's inadequacy was not caused by an event. It was baked in by arithmetic at the moment of the decision. There is nothing to point at.

Second, the delays that consumed the calendar were not the borrowers'. The mechanic's lien on the title commitment belonged to a prior owner's roofing contractor. The eleven days of silence between day 33 and day 44, when the file's nine pre-documentation conditions were already cleared and nothing moved, belonged to the lender's side of the table. Those are not borrower delays under any reading.

Third — and this is the precise point — the extension became necessary on day 12, not on day 41. It is tempting to blame the furniture. The borrowers financed \$5,200 of it on day 41, the pre-closing refresh caught it on day 44, and the closing slipped from day 45 to day 51. All true, and Chapter 19 owns that story. But run the counterfactual: suppose they had bought nothing and the file closed on day 45 exactly as the contract said. The lock still expires on day 42. An extension is still required. The furniture cost days at the end; it did not cost the lock. The lock was lost on day 12, by subtraction.

So the honest answer to "who pays when it is your fault" is often you — your employer, your branch's profit and loss, and in some shops your own compensation. That is worth sitting with rather than moving past, because it is the actual economics of the thing. Nobody sent the loan officer an invoice. Nobody put it on a Closing Disclosure. The borrowers, as far as they know, had a bumpy file that closed fine. And \$914.38 left the building anyway.

📞 On the Phone

The extension conversation you are tempted not to have.

The lender is paying the \$914.38. The borrowers' cash to close is unchanged at \$25,376.34. They will never see it on a document. The easy path is to say nothing, and most loan officers say nothing.

What the easy path sounds like: "Good news — we got the lock extended, no cost to you, we're all set for closing." True, incomplete, and it teaches the borrower nothing.

What the durable version sounds like:

"Two things. First, the good news: your rate is protected through closing and this doesn't change your cash to close at all — you're still bringing \$25,376.34, same as the last disclosure I sent you. Second, the part I'd rather tell you myself: your lock ran out on day 42 and the extension cost \$914.38. We paid it, not you, and that's the right outcome — you didn't cause the delay. But I want to be straight that I sized that lock against the calendar I hoped for instead of the one in your contract, and the contract said forty-five days. That's on me, and it's the reason I'll ask you for your closing date before I quote a rate for the rest of my career."

That is a hard paragraph to say. It also does something no marketing budget can buy: it tells a household that the person handling the largest transaction of their life will report their own errors before anyone asks. Borrowers close a mortgage every seven years and talk about it for thirty. They do not remember your rate. They remember whether you told them things.

Two guardrails. Do not turn candor into a performance — say it once, briefly, and move to the closing details. And do not confess to something that is not yours; if the delay was genuinely the title company's, say that plainly too.

30.9 The lock conversation, scripted

This is the conversation. It happens on almost every file, usually more than once, and there is a version of it that works.

The structure is always the same four moves: refuse the forecast, establish the calendar, price both directions in dollars, and get a decision in writing.

📞 On the Phone

"So — should we lock, or should we wait?"

---

The wrong answer, version one: "I'd float. Everybody's saying rates come down after the Fed meeting."

You have made a prediction. You cannot make it. When it is wrong you own every dollar of the difference in that borrower's mind, and they are not wrong to put it there — they asked a licensed professional and you answered as though you knew.

The wrong answer, version two: "Lock. Rates are going up."

Same error, opposite direction, and it has an ugly second feature: it happens to be the answer that closes your file faster and locks in your commission. Even when it is the right call, delivering it as a forecast makes it look like a sales tactic — and if the market improves, the borrower will decide it was one.

The wrong answer, version three: "It's really up to you."

Technically true and completely useless. They called you because they cannot evaluate this. Handing the decision back without a framework is not neutrality; it is abandonment with a compliant-sounding sentence attached.

---

What actually works:

You: "I'm going to answer that, but not the way you asked it, because the way you asked it has an answer nobody has. I can't tell you where rates are going. Nobody can — not me, not the person on television, not the economists whose whole job it is. Anyone who tells you otherwise is guessing with your money. What I can do is show you exactly what this decision costs you in each direction, and then you'll be making a real choice instead of a bet. Is that all right?"

Borrower: "Okay."

You: "Four questions. First, your contract closes on day 45. That's thirty-three days from today. That's not a lot of runway, and it's the most important fact in this conversation — whatever we do, the lock has to reach past day 45, and that means a forty-five-day lock, not a thirty."

"Second, where's your file? Appraisal is ordered, not back. Underwriting hasn't seen it. So we've got other things that can move on us, and every one of them eats days.

"Third — and this is the real question — what happens to you if this moves against us? Today, half a point buys 6.625%, and your payment with taxes, insurance, and mortgage insurance is \$3,033.72. If the market gives back a quarter and I have to re-price you at 6.875%, that same payment is \$3,094.50. Sixty dollars and seventy-eight cents a month, seven hundred twenty-nine a year, for as long as you own the house. Is that sixty dollars a problem for you, or is it an annoyance?"

Borrower: "It's an annoyance. It's not going to break us."

You: "Good — that's useful, and I believe you. Now the other side. If the market improves a quarter and we locked today, you'll have left about the same amount on the table going the other way. Fourth question, and I want you to actually picture it: which of those two phone calls is worse for you? The one where I tell you it went up and we're locked and you're fine, or the one where I tell you it went down and we're locked and you're not getting it?"

Borrower: "...the first one is fine. The second one would bug me."

You: "Then here's what I'd put in front of you. You have thirty-three days of runway and a file with three unknowns still in it, and by your own account you can absorb a move up but you'd be irritated by a move down. That's the profile of somebody who should lock and stop thinking about it — because you're not going to enjoy the floating, and the thing floating protects you from is the thing you just told me you can absorb.

"But that's a recommendation, not a fact, and it's yours to make. If you'd rather float, I'll do that — and if we float I'm going to make you agree to three numbers today: the price where we lock automatically, the price where we stop the bleeding and lock no matter what, and a date where we lock regardless of the market because your contract doesn't care about the market. I'll write it up and email it to you in ten minutes either way. Which are we doing?"

---

Why this works. It refuses the forecast openly, which builds more credibility than a confident guess ever has. It names the calendar first, because the calendar is the only fact in the room that is certain. It prices both directions in dollars this household can evaluate against their actual life. And it ends with a written instruction, so that the decision exists somewhere other than in two people's memories of a phone call.

The failure modes to watch. Borrowers hear "I recommend locking" as "he's pushing me to close" — so give the recommendation after the arithmetic, never before. Borrowers say "let's wait a few days" as a way of ending an uncomfortable conversation — so convert "wait" into the three written numbers before you hang up, or you will be having this call again on day 20 with thirteen fewer days of runway. And a borrower who is floating and cannot be reached is a borrower who is not floating; they are drifting.

30.10 Fallout, pull-through, and why the lock desk behaves as it does

Every rule your lock desk enforces looks arbitrary until you understand one number.

Fallout is the portion of locked loans that never fund. The borrower changed their mind. The purchase contract collapsed. The appraisal came in short and nobody could bridge the gap. The underwriter declined it. Or — and this is the one that matters most — the market improved and the borrower went and got a better rate somewhere else.

Chapter 29 introduced the complement of fallout, pull-through, as an input the desk uses when it decides how much to hedge; that chapter owns the mechanics of how it enters the calculation. What §30.10 owns is the behavior it produces on your desk.

Why fallout costs money when nothing was lent

Walk the chain from §30.1. You lock a loan. The desk hedges by selling forward. Weeks later:

Case 1 — rates rose. Securities prices fell, so the desk's forward sale gained. The locked loan is now worth less than it was, and the hedge covers the difference. Meanwhile fallout is low, because every borrower with a below-market lock is sprinting to the closing table. The hedge and the loans line up. The system works.

Case 2 — rates fell. Securities prices rose, so the desk's forward sale lost money. Ordinarily that is fine, because the locked loans themselves are now worth more and the gain offsets. Except that fallout is high in exactly this scenario — borrowers with above-market locks renegotiate, ask for a float-down, or simply leave. So the desk realizes the hedge loss without receiving the loans whose gain was supposed to pay for it.

THE ASYMMETRY THAT SHAPES EVERY LOCK POLICY   [constructed teaching example]

                  RATES RISE                    RATES FALL
                  ──────────────────────────    ──────────────────────────
  hedge           GAINS                          LOSES
  locked loans    worth less (offset by hedge)    worth more (should offset)
  fallout         LOW — everyone closes           HIGH — borrowers leave
                  ──────────────────────────    ──────────────────────────
  net             the hedge does its job          THE OFFSET WALKS OUT THE
                                                  DOOR AND THE LOSS STAYS

  A lock desk is not worried about rates going up. It is worried about
  rates going down and the pipeline evaporating at the same moment.

That is the whole explanation. Fallout is not merely a lost sale. It is a hedge that has to be unwound at a loss with no asset behind it, and it clusters precisely in the market where the unwind hurts most.

What that produces on your desk

Now re-read your lender's lock policy — the written rules governing when a loan may be locked, for how long, what extensions and relocks cost, what happens at expiration, and who may approve an exception. Every clause in it is an answer to the paragraph above.

• Some lenders will not let you lock until the file has reached a stage. Application taken, credit pulled, sometimes submitted. A lock on a file that does not exist is a free option with a low probability of ever becoming a loan.
• "Lock and shop" programs, where a borrower locks before finding a house, are restricted, shortened, or priced worse. They must be. The fallout on a borrower who has not yet won a contract is enormous.
• Cutoff times are hard. After cutoff the desk cannot hedge today's position, so it will not take today's risk.
• Extension fees are real fees, not penalties. The desk really is paying to roll a hedge forward.
• Worst-case pricing on relocks exists for exactly the reason §30.7 gave: expiration cannot be allowed to become a free re-roll.
• Exceptions are granted by a human being who keeps score. A loan officer who locks real files, closes most of them, requests extensions early, and tells the desk promptly when a file has died gets answers. A loan officer who locks every shopper to hold a quote, and funds half of what they lock, gets policy read to them.

That last point is not sentiment. Your pull-through is measured, at the branch level and often at the individual level, and it is one of the few numbers about you that the capital markets side of the building ever sees.

The professional posture

Three habits, and they cost nothing.

Lock real files. A lock is a commitment made on the borrower's behalf using the lender's balance sheet. It is not a way to hold a price while a borrower shops you against three other lenders.

Tell the desk early — both directions. When a file dies, say so the day you know. When you need an extension, ask the day you know, not the day it expires (§30.7).

Size it right the first time. Which brings this chapter back where it started, and to the file.

🗂️ The Loan File

Chapter 30 contribution: the lock decision, the expiration, and what floating would have cost.

The day-12 decision, as made

The day-12 decision, as it should have been made

THE LOCK AGAINST THE CALENDAR                       [the Linden Street file]

  day        12          20          30          40  42  45    51      57
             |-----------|-----------|-----------|---|---|-----|-------|
  AS TAKEN   [========== 30-day lock ===============]
                                                      ^ EXPIRES day 42
  contract closing date ..............................… ^ day 45  MISSED
  actual closing .....................................…… ^ day 51
  extension  [+15 days, 0.250 pt = $914.38 ==================….] ^ day 57

  AS IT SHOULD HAVE BEEN TAKEN
             [================= 45-day lock ==================….] ^ day 57

  SAME EXPIRATION DATE. HALF THE COST. DISCLOSED ON DAY 12 INSTEAD OF
  DISCOVERED ON DAY 42.

What happened on day 42

The lock expired with the file still open. A 15-day extension at 0.250 point = \$914.38** carried it to day 57. **The lender paid it as a tolerance cure.** Cash to close remained **\$25,376.34. The loan closed day 51, six days inside the extended lock.

What floating from day 12 would have cost or saved

Five constructed market paths, priced off the frozen grid at a constant half point of cost. [Constructed market movements — illustrative only. Not forecasts, not historical claims, and deliberately symmetric so the arithmetic teaches rather than argues.]

A market move can also show up as the same rate at a different cost rather than a different rate at the same cost. On this loan, if 6.625% had come to cost a full point instead of half a point, the discount charge would have been \$3,657.50** instead of **\$1,828.75 — **\$1,828.75 more in cash at closing**, out of reserves that ended the file at \$7,423.66 after the day-46 furniture payoff. Two eighths of market movement, one payment shock, one very unpleasant call.

What this settles. The rate is 6.625% and it is protected through closing. The discount charge of \$1,828.75 is fixed. The extension is paid, by the lender, and the borrowers' cash to close is unchanged.

What it does not settle. Whether the lock should ever have been thirty days. It should not have been. On day 12 the correct lock was 45 days, expiring day 57 — the same date the extension eventually bought, at roughly half the cost, disclosed to the borrower up front rather than absorbed quietly by the lender six weeks later.

Open questions carried forward:

• Q30-a. If your lender's lock policy applies worst-case pricing on relocks, what would this file have cost had the extension been refused? (§30.7)
• Q30-b. Which of the six days between day 45 and day 51 were actually recoverable? (Chapters 19 and 39)
• Q30-c. The borrowers had a lower quote from another lender in hand. What does a lock — and its expiration — do to a borrower's willingness to move? (Chapter 40)

Your task. In the Appendix C workbook, do the subtraction the loan officer did not do. Write the lock date, the contract closing date, and the difference. Then write, in one sentence, the lock period you would have taken on day 12 and why. Then do the same thing tomorrow on a live file on your own desk, before you quote anybody a rate.

Conclusion

A rate lock is an option the lender wrote, hedged in the forward market the same afternoon you requested it. That single fact explains the price of a lock, the higher price of a longer one, the fee on an extension, the asymmetry of worst-case pricing, and the reason a borrower who walks away costs money even though nothing was ever lent.

The lock decision itself has no rule. It has four inputs — the time genuinely remaining, the state of the file, what the household can absorb, and what they can live with — and a professional obligation to refuse the forecast. A loan officer who tells a borrower rates are going down has made a prediction nobody can make and will own every dollar of it. What you can do instead is price both directions in dollars and put the decision in writing.

Mortgage rates move on the price of mortgage-backed securities, which move on inflation and employment data, on expectations about future policy, on Treasury supply, and on prepayment risk. They do not move on the federal funds rate, which is an overnight bank rate, and they can rise on the afternoon of a cut. Rate sheets are published in the morning and can be repriced without notice, so a rate quoted at 9:00 is a rate that existed at 9:00 and nothing more.

And the lock has to be long enough. On the Linden Street file it was not. A 30-day lock taken on day 12 expired on day 42 against a contract that named day 45 — three days short on the day it was signed, before a lien surfaced on the title commitment, before eleven days went quietly by, before any furniture was financed. The 15-day extension that fixed it cost \$914.38 and carried the lock to day 57. A 45-day lock on day 12 would have expired on day 57 as well, for roughly half the money, disclosed to the borrower instead of absorbed by the lender.

The lesson is a subtraction, and it takes ninety seconds: the contract's closing date, minus today, plus a buffer for what you do not control. Not your optimism. Optimism is not a lock period, and every day of it costs somebody money.

Next: you now know where the money comes from, how the rate is built, and how it is protected. Chapter 31 answers the question underneath all three — who you actually work for. Retail, broker, and correspondent are not three flavors of the same job; they are three different businesses with different economics, different products, and very different answers to "whose balance sheet just paid \$914.38."

Key Terms

Rate lock — a lender's binding commitment to deliver a specific interest rate at a specific price on a specific loan for a specific period, provided the loan closes within the period and the pricing facts do not change. It is not a loan approval and does not obligate the borrower. (Ch.30)

Float — to decline to lock, leaving the loan's rate and price subject to whatever the market does until a lock is taken. (Ch.30)

Lock period — the number of days a lock stands; commonly 15, 30, 45, or 60, with longer periods costing more because a longer option is worth more. (Ch.30)

Lock expiration — the date (and usually time) on which the lender's commitment ends. Measured from the lock date, not from the closing date, and it does not extend itself. (Ch.30)

Float-down — an option written into a lock permitting the borrower to take some or all of a market improvement, once, above a trigger threshold, inside a stated window. It is a second option layered on the lock and is paid for by fee or by a worse initial price. (Ch.30)

Lock extension — additional days added to an existing lock at the same rate and price, for a fee, usually priced per day or in blocks and usually more expensive with each successive extension. (Ch.30)

Worst-case pricing — the convention, applied by most lock policies on a relock, of delivering the worse of the original locked price and current market pricing; it removes any benefit a borrower would otherwise gain by letting a lock expire in an improving market. (Ch.30)

Relock — a new lock taken after a prior lock has expired, priced off the current sheet subject to worst-case pricing and any cooling-off period in the lender's lock policy. (Ch.30)

Lock desk — the secondary-marketing function that prices the day's rate sheet, confirms locks, hedges the resulting position, sets cutoff times, and approves or refuses extensions and exceptions. (Ch.30)

Market movement — a change in secondary-market pricing between the time a rate sheet was published and the present moment; the reason a quote has a shelf life. (Ch.30)

Reprice — a lender's mid-day reissue of the rate sheet in response to market movement, for better or for worse; the prior sheet becomes void for anything not already locked. (Ch.30)

Lock policy — a lender's written rules governing when loans may be locked, for what periods, what extensions and relocks cost, what happens at expiration, and who may approve exceptions. (Ch.30)

Fallout — locked loans that never fund. Costly to the lender because the hedge placed against the lock must be unwound without the loan behind it, and it clusters in improving markets, when that unwind is most expensive. (Ch.30)

Spaced Review

1. (Ch. 30) A purchase contract executed today names a closing forty days out. You are locking today. State the minimum lock period you would take and the arithmetic that produced it, and name three things that could consume the buffer.

2. (Ch. 29 → Ch. 30) Chapter 29 built this file's rate from a base price plus a stack of adjustments. Name the adjustment on that stack that this chapter is about, say which direction it moves when you go from a 30-day lock to a 45-day lock, and explain — using §30.1 — why it moves that way.

3. (Ch. 13 → Ch. 30) Chapter 13 compared conventional 95% against FHA 96.5%, where the FHA option carried a 6.250% rate. Suppose the file had been locked as FHA on day 12 and the borrowers then decided to switch to conventional. What happens to the lock, and why is "but conventional is a better loan for them" not an answer to that question?

4. (Ch. 13 → Ch. 30) Chapter 13 priced a 2-1 temporary buydown on this loan at \$8,375.40 escrowed, taking the borrower's first-year payment to \$1,880.47. If the file had been floating when that structure was proposed and the market had moved a quarter point against them, would the buydown have protected the borrower? Explain what the buydown does and does not insulate.

5. (Ch. 30 → Ch. 29) Your borrower calls at 11:15 and says the news reported a Federal Reserve rate cut this morning, so why did your rate get worse? Answer in three sentences, using §30.4 for the instrument and Chapter 29's price-versus-rate distinction for the mechanism.