49: The Man Who Wants to Better Trading by Slowing It

Episode Summary

Executive Summary: The episode is an in-depth interview with IEX CEO Brad Katsuyama about the exchange’s origins, its anti-speed-bump design, and how Flash Boys shaped its public identity and growth. Katsuyama argues IEX exists to improve market fairness for long-term investors, explains the SEC approval fight, and says the firm will stay focused on U.S. equities while building trust and execution quality rather than chasing market share.

Main Topics: IEX’s origin story and mission (Priority: 5/5): Katsuyama explains how experiences at RBC revealed structural problems in U.S. equity markets, leading to the creation of IEX as a venue designed to protect investors from being disadvantaged by speed and information asymmetry. Router, speed bump, and market design (Priority: 5/5): The conversation revisits the original router-based concept behind IEX, why it evolved into an exchange, and why the speed bump and related order types became central to the platform’s structure. Flash Boys and public perception (Priority: 4/5): The hosts and Katsuyama discuss Michael Lewis’s book, how it amplified IEX’s story, boosted credibility, and also created controversy and backlash among market participants. SEC approval and industry opposition (Priority: 5/5): Katsuyama describes the lengthy SEC process, the unusually vocal opposition from other exchanges, and the role of buy-side support in pushing the debate into public view. Competitive strategy and success metrics (Priority: 4/5): IEX says it is not optimizing for market share or revenue targets, but for customer execution quality, trust, and alignment with long-term investors, even if that means lower trading volume. Future growth, listings, and focus (Priority: 3/5): The interview touches on possible expansion into listings, other asset classes, and other geographies, but Katsuyama stresses that IEX remains focused on U.S. equities and avoiding distraction. Culture, incentives, and philosophy (Priority: 3/5): Katsuyama reflects on how teams with backgrounds from exchanges, regulators, and high-frequency trading bring different perspectives, and argues that market participants are increasingly judged on how they make money, not just whether they do.

Key Arguments: IEX was built to address structural inequities in market access, not just a narrow routing problem, because order flow and resting liquidity were both affected by speed and information asymmetry. The company’s original router mattered, but the exchange model became more important because it allowed IEX to solve a broader market-structure problem with speed bumps and specialized order types. IEX’s value proposition is as much about trust and credibility with the buy side as it is about specific mechanisms like DPEG; many clients use the venue because they believe it represents their interests. Flash Boys expanded awareness dramatically and helped IEX grow, even though it also upset some market participants and created controversy that the firm had to manage. IEX does not want to maximize volume at all costs; features like the speed bump and no-rebate model intentionally sacrifice some trading volume to improve execution quality and alignment. The SEC process was unusually contentious because exchanges publicly opposed IEX, but the scrutiny also reflected the stakes and ultimately validated the rigor of the review. The company’s strategy is to stay narrowly focused on U.S. equities until it has fully developed its core business and market-structure mission. Market participants influence exchange design, but IEX argues the exchange should filter ideas for broad utility and reject changes with unintended consequences. Katsuyama believes the financial system is moving toward greater transparency, making it easier for people to pursue different career paths if they disagree with the incentive structure they operate under.

Data Points: Audio format length: 5 minutes or less - Promotional intro for Bloomberg’s Stock Movers report Bloomberg journalists and analysts: 3,000 - Promotional intro emphasizing Bloomberg’s reporting network IEX market activity routed per day: 40 to 50 million shares - Katsuyama says the router now handles this volume daily IEX market activity matched per day: 10 million shares - Katsuyama says this is executed on IEX’s own market IEX team size: 74 people - Katsuyama describes the firm as still small and focused on U.S. equities Time to raise money for IEX: Nine and a half months - Katsuyama uses this to illustrate how difficult the early fundraising was SEC comment-letter comparison: 3 letters across 4 exchange approvals - Katsuyama says BATS and Direct Edge faced little public debate compared with IEX Chicago speed bump latency: a few microseconds or 350 microseconds - Discussion of Chicago Stock Exchange’s asymmetrical speed bump versus IEX’s model NASDAQ proposal speed bump: 5 milliseconds - Referenced as an older asymmetrical latency proposal Broad market timing reference: 10 years ago / 2002 / 2012 - Timeline markers around RBC origin, early career, and IEX’s development

Pivotal Quotes: "the market has evolved in a way where they were kind of in a position to be the last to know" — Brad Katsuyama: Explaining why IEX believes it serves investors and why trust matters to clients "we think it’s a benefit to IEX and it’s a benefit to, to kind of the investors and brokers that we’re trying to cater to" — Brad Katsuyama: On why IEX avoids paying rebates and accepts lower volume as part of its model "we’re driven and motivated in a different way" — Brad Katsuyama: Describing why IEX prioritizes neutrality, buy-side ownership, and alignment over pure revenue maximization

Implications: The interview frames IEX as a case study in market-structure reform: a venue trading off volume and incentives to privilege fairness, transparency, and investor trust. It suggests future competition will hinge less on speed alone and more on how exchanges align with long-term investors.