Haim Bodek

Haim Bodek

Formal First Name

Haim Bodek is an electronic trading executive, market structure expert, crypto trader and execution specialist with over 20 years of experience in the automated trading space. Haim is Managing Principal of Decimus Capital Markets, a tactical consulting and strategic advisory firm focused on high frequency trading and U.S. equities market structure; and Co-Founder and Co-Portfolio Manager of Hyperion Decimus, a digital asset manager that offers investing in the cryptocurrency space from a market structure and liquidity arbitrage perspective. Haim is known as a whistleblower who brought attention to several questionable practices of high-frequency traders and trading venues. He is widely recognized as a leading expert in U.S. equities market structure, specializing in the regulation of high frequency trading and trading venues, as well as a wide range of trading practices. Haim was formerly Founder and CEO of Trading Machines, an independent high frequency options trading firm. Before that, he had held several positions in the securities industry, such as the joint global head of electronic volatility trading at UBS and a financial engineer at Goldman Sachs. He is also the author of two books on market structure, The Problem of HFT and The Market Structure Crisis, as well as the subject of the documentary film The Wall Street Code directed by Marije Meerman.

Professional Experience

Academic History


  • Haim has spent his career in the high-frequency trading (HFT) industry as a quantitative programmer/analyst, a financial engineer, and an entrepreneur.

  • In 2011, he uncovered an algorithmic anomaly in HFT exchanges, investigated it, and reported it to the U.S. Securities and exchange Commission.

  • He is generally credited with unleashing the so-called "order type controversy," which focuses on abusive practices relating to complex nontransparent order types.

  • His contributions have influenced the ongoing public policy debate and the rapidly changing landscape for regulatory, enforcement, and litigation issues.

  • He has actively assisted the SEC in several investigations that resulted in substantial monetary fines and significant changes in practices.

  • He began his trading career at Hull Trading, a prestigious firm well known for driving forward innovation in the domain of automated trading.


  • His career, experiences, and advocacy for regulatory reform of securities markets are described extensively in Dark Pools by Scott Patterson, a freelance writer and staff reporter for The Wall Street Journal.

  • He is the subject of the documentary film The Wall Street Code directed by Marije Meerman.

  • Haim has also appeared as a guest on Real Vision.