Chapter 18: Further Reading — MiFID II, MiFIR, and Best Execution Compliance

This further reading list is organised by category: primary regulatory sources, secondary regulatory guidance and policy, industry practitioner resources, and academic and professional literature. For each item, a brief annotation describes its relevance and how to access it.

1. Primary Regulatory Sources

EU Legislative Instruments

Directive 2014/65/EU of the European Parliament and of the Council (MiFID II) Official Journal of the European Union, L 173, 12 June 2014, pp. 349–496

The foundational directive text. Authoritative for the scope of the investment services regime, venue authorisation requirements (Regulated Markets, MTFs, OTFs), investor protection obligations, best execution (Article 27), client order handling (Article 28), and algorithmic trading requirements (Articles 17-18). Practitioners should read Articles 24-30 (investor protection and market conduct) and Articles 44-56 (trading venue authorisation) carefully. Available at eur-lex.europa.eu. Note that the consolidated version incorporating all amending regulations is most useful for operational reference.

Regulation (EU) No 600/2014 of the European Parliament and of the Council (MiFIR) Official Journal of the European Union, L 173, 12 June 2014, pp. 84–148

The directly applicable regulation governing transaction reporting (Article 26), pre-trade transparency (Articles 3-13), post-trade transparency (Articles 20-21), mandatory trading obligations (Article 23 equities; Articles 28-30 derivatives), Systematic Internalisers (Articles 14-19), and Approved Reporting Mechanisms/Approved Publication Arrangements (Articles 59-66). Article 26 and its associated delegated regulations are the definitive source for transaction reporting obligations. Available at eur-lex.europa.eu.

Commission Delegated Regulation (EU) 2017/590 (RTS 22 — Transaction Reporting) Official Journal of the European Union, L 87, 31 March 2017

The technical standards specifying the 65-field transaction report template. Annex I contains the complete field-by-field specification including permitted values, field formats, and conditional logic. Essential reading for any practitioner responsible for transaction reporting implementation. Available at eur-lex.europa.eu.

Commission Delegated Regulation (EU) 2017/575 (RTS 27 — Execution Quality by Venues) Official Journal of the European Union, L 87, 31 March 2017

Specifies the execution quality data that trading venues, SIs, market makers and other liquidity providers must publish quarterly. Note: the RTS 27 obligation was suspended by the Capital Markets Recovery Package (Regulation (EU) 2021/23 — the "Quick Fix" regulation) from 28 February 2021. However, the RTS text remains relevant for understanding what data was originally required and may inform any future reimposition or reformed version of the requirement.

Commission Delegated Regulation (EU) 2017/576 (RTS 28 — Investment Firm Execution Reports) Official Journal of the European Union, L 87, 31 March 2017

Specifies the content and format for annual best execution reports published by investment firms. Defines the five instrument classes (equity instruments with tick size regime; equity instruments without tick size regime; debt instruments; interest rate derivatives; credit derivatives; and others). The specific format for machine-readable publication is detailed in accompanying technical standards.

Commission Delegated Regulation (EU) 2017/565 (Implementing MiFID II) Official Journal of the European Union, L 87, 31 March 2017

Covers a wide range of MiFID II implementing requirements including the definition of systematic internaliser, best execution policy requirements, order execution policy content, and algorithmic trading definitions. Chapter IV (Articles 59-76) is particularly relevant for best execution.

UK Retained Law (Post-Brexit)

UK MiFIR (Regulation (EU) No 600/2014 as retained in UK law by the European Union (Withdrawal) Act 2018)

The UK version of MiFIR, as amended by the Markets in Financial Instruments (Amendment) (EU Exit) Regulations 2018 (SI 2018/1403) and subsequent instruments. Available on legislation.gov.uk. Note that the FCA publishes consolidated versions through its website.

Financial Services and Markets Act 2023

Implements many of the Wholesale Markets Review outcomes in primary legislation. Grants the FCA new powers to modify the inherited EU framework. Relevant provisions include the reform of the SI regime, the data reporting services framework, and the reform of transparency obligations. Available on legislation.gov.uk.

2. Regulatory Guidance and Supervisory Policy

ESMA Guidelines and Q&A

ESMA, "Guidelines on transaction reporting, order record keeping and clock synchronisation under MiFID II" (ESMA/2020/1897, updated) European Securities and Markets Authority

The definitive ESMA guidance document on transaction reporting. Provides field-by-field guidance on all 65 fields in the RTS 22 template, including detailed guidance on the algorithmic trading indicators (Fields 26-28), national identifier codes for natural persons, TVTIC format requirements, and OTC transaction identification. This is an essential operational reference. Updated periodically; always use the most current version from esma.europa.eu.

ESMA, "Q&A on MiFID II and MiFIR transparency topics" (ESMA70-872942901-35) European Securities and Markets Authority

Covers pre- and post-trade transparency, including SI obligations, APA requirements, and the double volume cap. Updated regularly in response to industry queries. Available at esma.europa.eu.

ESMA, "Q&A on MiFID II and MiFIR investor protection topics" (ESMA35-43-349) European Securities and Markets Authority

Covers best execution, including the interpretation of the five execution factors, best execution policy requirements, and the scope of the obligation. Section 9 addresses best execution specifically.

ESMA, "Annual Reports on MiFIR data quality" European Securities and Markets Authority

ESMA publishes annual assessments of MiFIR transaction reporting data quality. These reports identify the most common reporting errors by field and error type across all EU NCAs. Invaluable for prioritising data quality investment. The 2022 report, in particular, documents the industry-wide prevalence of Field 27 (algorithmic decision-making indicator) errors. Available at esma.europa.eu.

ESMA, "MiFID II/MiFIR Review Report — Equity Markets" (ESMA70-156-2430, 2020)

ESMA's comprehensive review of the MiFID II equity market structure rules, including the effectiveness of the double volume cap, systematic internaliser framework, and pre-trade transparency waivers. Provides detailed data on market structure changes since MiFID II implementation and ESMA's recommendations for reform.

FCA Policy Statements and Guidance

FCA, "Policy Statement PS17/14: Markets in Financial Instruments Directive II implementation" (July 2017)

The FCA's final rules implementing MiFID II into the FCA Handbook, prior to Brexit. Covers the UK approach to best execution (COBS 11.2A), transaction reporting (SUP 17), and market structure. While partly superseded by Brexit-era amendments, PS17/14 remains relevant for understanding the FCA's interpretation of MiFID II requirements in areas where UK and EU rules remain aligned.

FCA, "Consultation Paper CP21/9: A new UK prudential regime for MiFID investment firms and a review of the UK's market framework" (March 2021)

The WMR consultation paper. Sets out the FCA's proposed changes to the UK's inherited EU MiFID II framework, including: the single volume cap to replace the DVC; reforms to SI determination; changes to the transparency waiver framework; and the suspension of the RTS 27 equivalent. Essential reading for understanding the direction of UK regulatory divergence.

FCA, "Policy Statement PS22/2: Wholesale Markets Review: The UK MiFID framework" (March 2022)

The WMR final policy statement. Documents the FCA's final decisions on all areas covered by CP21/9, including the 7.5% single volume cap, the reformed transparency waiver framework, and the approach to SI determination. Chapter 3 covers best execution reforms. Available at fca.org.uk.

FCA, "Thematic Review TR19/1: Best Execution" (June 2019)

The FCA's major best execution thematic review, published one year after MiFID II implementation. Identifies the most common best execution failures observed across the industry — including stale policies, single-venue routing, and absence of retrospective execution quality analysis. The findings in TR19/1 directly shaped the FCA's supervisory approach to best execution in subsequent years and remain highly relevant to compliance practice.

3. Industry and Practitioner Resources

AFME (Association for Financial Markets in Europe), "MiFID II/MiFIR Implementation Guide" Association for Financial Markets in Europe

AFME has published extensive practitioner guidance on MiFID II implementation, including detailed guides on transaction reporting, best execution, transparency, and the SI framework. AFME's MiFID II guides are particularly valuable for buy-side and sell-side practitioners navigating the practical implementation of the reporting requirements. Available at afme.eu.

AFME, "European Equity Markets Report" Association for Financial Markets in Europe, published annually

Contains data on European equity market structure, venue market share, dark trading volumes, and SI activity. Essential for understanding how the MiFID II venue landscape has evolved since implementation and for contextualising best execution venue analysis.

Investment Association, "MiFID II Transaction Reporting: A Practical Guide for Asset Managers" The Investment Association

A buy-side focused guide to MiFID II transaction reporting, with particular attention to the specific challenges of asset managers (investment decision maker identification, discretionary vs. advisory mandates, fund-level vs. entity-level reporting). Available at theia.org.

ICMA (International Capital Market Association), "MiFID II/MiFIR: A Guide to the Transparency and Reporting Requirements for Fixed Income Markets"

Covers the specific challenges of bond and structured product transparency and reporting under MiFID II, including the liquidity determination methodology, deferred publication, and OTF requirements. Available at icmagroup.org.

FIX Trading Community, "MiFID II/MiFIR Transaction Reporting — Technical Implementation Guide"

A technical guide to the FIX protocol implementation of MiFID II transaction reporting messages, including field mapping and algorithmic trading indicator logic. Useful for technology teams building or integrating reporting systems. Available at fixtrading.org.

4. Academic and Professional Literature

Harris, Lawrence. "Trading and Exchanges: Market Microstructure for Practitioners." Oxford University Press, 2003.

The foundational academic text on market microstructure. Although published before MiFID II, Harris's treatment of bid-ask spreads, price discovery, adverse selection, and market impact provides the theoretical underpinning for understanding best execution metrics — implementation shortfall, VWAP, arrival price benchmarking — that are central to MiFID II compliance practice. Chapters 13-15 on dealers and market makers are particularly relevant for understanding the economics of Systematic Internalisers.

Hasbrouck, Joel. "Empirical Market Microstructure: The Institutions, Economics, and Econometrics of Securities Trading." Oxford University Press, 2007.

A more technically demanding companion to Harris, covering the econometrics of transaction cost measurement and price impact estimation. Directly relevant to the quantitative side of best execution analytics — how to measure implementation shortfall, how to estimate market impact, and how to construct statistically valid comparisons across venues and time periods.

Petrescu, Monica, and Michael Wedow. "Dark Pools in European Equity Markets: Emergence, Competition, and Implications." ECB Occasional Paper No. 193, European Central Bank, 2017.

An empirical study of dark pool trading in European equity markets following MiFID I, providing context for understanding why the MiFID II double volume cap was introduced and what its effects have been. Uses transaction-level data to analyse the relationship between dark pool trading and price discovery.

Gresse, Carole. "Effects of Lit and Dark Market Fragmentation on Liquidity." Journal of Financial Markets, Vol. 35, 2017, pp. 1-20.

Academic study of how market fragmentation across lit and dark venues affects liquidity in European equity markets. Provides empirical evidence on the effects of MiFID I's deconcentration and is directly relevant to understanding the policy debate around the MiFID II double volume cap and the trade-off between competition and price formation quality.

Gomber, Peter, et al. "Financial Technology in Financial Markets: A Review of Extant Literature." SAFE Working Paper No. 273, Research Center SAFE, 2021.

A comprehensive literature review of the academic research on RegTech and financial technology in capital markets. Covers algorithmic trading, market surveillance, transaction reporting technology, and execution analytics — directly relevant to the RegTech themes of Chapter 18.

Buti, Sabrina, et al. "Internalization, Clearing, and Settlement, and Stock Market Quality." The Journal of Finance, 74(1), 2019, pp. 321-372.

Academic study of systematic internalization and its effects on market quality. Empirically examines how SI trading (in the US context of payment for order flow) affects price discovery and execution quality — relevant to the European policy debate on SIs post-MiFID II.

5. Data Sources and Regulatory Databases

ESMA Financial Instruments Reference Data System (FIRDS) esma.europa.eu/data-and-statistics

ESMA's public database of financial instruments admitted to trading on EU venues, providing ISIN, instrument classification, and venue admission data. Essential for transaction reporting instrument scope determination. Updated daily.

GLEIF Global LEI Repository (GLEIS) gleif.org/lei

The global registry of all issued LEIs, with current status (active, lapsed, retired), entity reference data, and ownership relationships. Essential for LEI validation in transaction reporting and for understanding the "no LEI, no trade" compliance requirement.

ESMA Double Volume Cap Data esma.europa.eu/data-and-statistics/double-volume-cap-data

Monthly published data on equity trading volumes under reference price and negotiated transaction waivers, by instrument and by venue. Essential for monitoring DVC compliance and understanding the current state of dark trading in European equity markets.

FCA Transaction Reporting Data fca.org.uk/data/transaction-reporting-data

The FCA publishes aggregate data on MiFIR transaction reports received. Useful for understanding reporting volumes and trends for UK-regulated firms.

6. RegTech Vendor Landscape: Further Research

Practitioners researching transaction reporting and best execution technology should consult the following types of vendor documentation and independent assessments:

ARM providers: Unavista (LSEG), DTCC, Abide Financial, Cappitech, and others publish technical specifications and implementation guides. Comparing ARM validation capabilities, connectivity options, and data quality reporting tools is a key procurement decision.

Best execution analytics: Software vendors in this space include Virtu Analytics, Abel Noser (Nasdaq), ITG (now Virtu), and a number of smaller specialists. The FactSet and Bloomberg platforms also provide execution quality analytics capabilities. Practitioner reviews from the TRADE publication (thetradenews.com) and WatersTechnology (waterstechnology.com) provide independent assessments.

Regulatory reporting utilities: The emergence of "utility" models — where multiple firms share a common reporting infrastructure to reduce per-firm costs — is an active area of RegTech development. DTCC's Global Trade Repository and LSEG's Unavista platform are examples of utility-scale reporting infrastructure. Academic and practitioner literature on the utility model can be found in publications from the World Federation of Exchanges and the Financial Stability Board.

Return to: Chapter 18 Index | Proceed to: Chapter 19 — Market Abuse Regulation (MAR), Trade Surveillance, and Communications Monitoring