Selected Essays on Market Microstructure

Table of Contents

1 INTRODUCTION

1.1 MOTIVATION

1.2 OVERVIEW AND ORGANIZATION

2 THE STRUCTURE OF THE GERMAN EQUITY MARKET

2.1 GENERAL OVERVIEW

2.2 TRADING VENUES

2.2.1 Screen-based Trading at Xetra

2.2.2 Floor-based trading at the Frankfurt Stock Exchange

2.3 INTERMEDIARIES AND MARKET ACCESS

2.4 INTERNATIONAL COMPARISON OF GERMAN EQUITY MARKET

3 MARKET QUALITY OF FLOOR TRADING WHEN SCREEN TRADING CLOSES EARLY

3.1 INTRODUCTION

3.2 RELATED LITERATURE AND TESTABLE HYPOTHESES

3.3 DATA

3.4 LIQUIDITY AND TRADING ACTIVITY

3.5 PROBABILITY OF INFORMED TRADING

3.5.1 Methodology

3.5.2 Results

3.6 INFORMATIONAL EFFICIENCY OF PRICES

3.6.1 Methodology

3.6.2 Results

3.7 CONCLUSIONS

4 DUAL TRADING IN ANONYMOUS MARKETS

4.1 INTRODUCTION

4.2 RELEVANT LITERATURE

4.2.1 Dual Traders and Information Steaming from Order Flow

4.2.2 Dual Traders and Information Steaming from Hidden Order Volume

4.2.3 Advantage for Parasitic Traders at Xetra

4.3 DATA

4.3.1 Descriptive Statistics

4.3.2 Trader Classification, Order Classification and Trading Profits

4.4 FRONT-RUNNING AND PIGGY-BACKING

4.4.1 Empirical Tests

4.4.2 Robustness Tests

4.5 ICEBERG ORDERS AND ORDER BOOK INFORMATION

4.6 LIQUIDITY PROVISION

4.7 CONCLUSIONS

5 INTRADAY PATTERN OF PRINCIPAL- AND AGENT-ACCOUNT TRADING VOLUME

5.1 INTRODUCTION

5.2 LITERATURE OVERVIEW

5.3 INSTITUTIONAL DETAILS AND DATA

5.3.1 Subject of Study: Xetra vs. New York Stock Exchange

5.3.2 Descriptive Statistics

5.4 TRADING ACTIVITIES ACROSS TIME AND TRADING REGIMES

5.4.1 Sub-Sample Test

5.4.2 Regression Framework

5.4.3 Discussion

5.5 SUMMARY

6 CONCLUSION AND OUTLOOK

Objectives & Key Themes

This thesis investigates the strategic behavior of informed and uninformed market participants within the German equity market, focusing on how recent institutional changes and market structures impact trading efficiency. The primary objective is to assess the validity of existing theoretical frameworks—such as those regarding inventory and information-based models—under current conditions characterized by high-frequency data and technological advancements like algorithmic trading.

• Effects of reduced business hours on market quality and liquidity in parallel trading systems.
• Empirical analysis of dual trading behavior in anonymous electronic order book environments.
• Evaluation of intraday trading volume patterns for principal- versus agent-account transactions.
• Impact of anonymity and market transparency on parasitic trading strategies and information asymmetry.
• Assessment of network externalities and best execution in fragmented financial markets.

Excerpt from the Book

Summary of Chapters

1 INTRODUCTION: Discusses the motivation, scope, and research goals of the thesis regarding market microstructure and the validity of current theoretical models.

2 THE STRUCTURE OF THE GERMAN EQUITY MARKET: Provides an overview of the German market, including segmentation, trading venues like Xetra and FSE, and international comparisons.

3 MARKET QUALITY OF FLOOR TRADING WHEN SCREEN TRADING CLOSES EARLY: Analyzes the consequences of reducing Xetra's trading hours on market quality and price discovery at the Frankfurt Stock Exchange.

4 DUAL TRADING IN ANONYMOUS MARKETS: Investigates whether dual traders in anonymous electronic markets systematically abuse informational advantages, such as front-running or piggy-backing.

5 INTRADAY PATTERN OF PRINCIPAL- AND AGENT-ACCOUNT TRADING VOLUME: Explores systematic variations in trading behavior throughout the day and how principal versus agent accounts contribute to intraday volume patterns.

6 CONCLUSION AND OUTLOOK: Summarizes findings and provides a discussion on future research regarding fragmentation, best execution, and electronic trading.

Keywords

Market Microstructure, Xetra, Frankfurt Stock Exchange, Dual Trading, Algorithmic Trading, Informed Traders, Market Liquidity, Information Asymmetry, Order Flow, Price Discovery, Trading Venues, Order Types, Intraday Patterns, Network Externalities, Transaction Costs

Frequently Asked Questions

What is the core focus of this research?

The research focuses on market microstructure in the German equity market, examining how market participants like informed and uninformed traders adapt their strategies in response to technological and regulatory changes.

What are the primary themes of the work?

Key themes include the impact of market fragmentation, the role of dual traders, intraday trading patterns, and how trading mechanisms influence market efficiency and liquidity.

What is the central research question?

The work seeks to determine if traditional theoretical models of market microstructure remain valid in a modern, highly electronic, and fragmented environment characterized by rapid technological progress.

Which scientific methodology is primarily applied?

The thesis utilizes empirical, data-driven analysis of proprietary transaction data from Xetra and the FSE, employing structural microstructure models, regressions, and statistical tests to infer behavior that is not directly observable.

What topics are covered in the main section?

The main sections cover the analysis of parallel trading systems, an in-depth investigation into dual trading practices, and a study of intraday volume distribution differences between principal and agent accounts.

Which keywords best describe this study?

Market Microstructure, Xetra, Dual Trading, Informed Traders, Liquidity, Information Asymmetry, and Price Discovery are among the most essential.

How does the research assess dual trading?

It examines whether dual traders exploit private information from customer order flow or hidden order volume, utilizing a trader-by-trader empirical analysis rather than just cross-sectional comparisons.

What conclusion does the author draw regarding market anonymity?

The author argues that even in highly anonymous trading environments, empirical evidence does not support the widespread existence of abusive practices like systematic front-running, which supports the case for anonymity.