Michael Lewis exposes how high-frequency traders rigged the US stock market and follows the unlikely heroes who built a fairer exchange.
Flash Boys tells the story of Brad Katsuyama, a Canadian trader at RBC who discovered that high-frequency trading firms were using speed advantages to front-run stock orders. Every time he tried to buy shares, prices moved before his order went through. Someone was seeing his trades and racing ahead of him.
The book follows Brad as he assembles a team of misfits, including an Irish telecom guy, a Croatian 9/11 survivor, and an Air Force veteran, to figure out exactly how the rigging worked. Their investigation revealed that stock exchanges, dark pools, and big banks were all profiting from a system designed to extract billions from regular investors.
The story also covers Sergey Aleynikov, a Russian programmer arrested by the FBI for allegedly stealing Goldman Sachs trading code. His case became a window into how Wall Street’s most powerful firms used the legal system to protect their interests while keeping the public in the dark about how markets really worked.
Brad’s team eventually built IEX, a new stock exchange with a built-in speed bump that prevented high-frequency traders from front-running orders. The book is Michael Lewis at his best, turning a complicated financial story into a page-turner about fairness, technology, and what happens when regular people decide to fight back against a broken system.
So I just finished re-reading Flash Boys by Michael Lewis, and honestly, it hits different every time. This book came out in 2014 and people are still arguing about it. That tells you something.
Michael Lewis starts “Flash Boys: A Wall Street Revolt” with one of the best ironies I’ve seen in a finance book. After the 2008 financial crisis, after everything Goldman Sachs did, the only Goldman employee who got arrested was a guy who took something FROM Goldman. Not someone who helped crash the economy. A Russian programmer named Sergey Aleynikov who copied some code.
Chapter 1 of Flash Boys opens like a heist movie. Two thousand workers are digging across America. They don’t know why. They don’t know what they are building. And they are told to keep their mouths shut.
Chapter 2 of Flash Boys is where we meet Brad Katsuyama. And honestly, this is where the book really starts cooking. Because Brad is not some Wall Street hotshot from Goldman Sachs. He’s a Canadian guy from Toronto who ended up in New York almost by accident.
Every person I know who works in IT started from the bottom. Fixing cables, carrying equipment, dealing with angry users. Nobody hands you a corner office in tech. You earn it by touching the actual hardware. And that’s exactly why Ronan Ryan understood something that every Wall Street trader missed.
By the end of 2010, Brad’s team had built a weapon. Thor worked. It protected investors from getting front-run by high-frequency traders. But here’s the problem. They had built a defense against an enemy they barely understood.
This chapter hit me personally. I’m from the former USSR myself. I know people exactly like Sergey Aleynikov. Brilliant programmers who left because the system wouldn’t let them be what they were meant to be. Reading this felt less like a book and more like a story someone told me over tea.
Chapter 6 is where everything gets real. Brad and his team stop talking about the problem and start building the solution. They quit their jobs, raise money, hire puzzle solvers, and design a stock exchange from scratch. And the centerpiece of the whole thing is a coil of fiber optic cable stuffed inside a box the size of a shoe.
Chapter 7 is called “An Army of One.” And it starts not with trading algorithms or secret cables. It starts with a guy on the subway on September 11, 2001.
In Part 1 we talked about the misfits Brad recruited to build IEX. Now we get to the good stuff. They launched it. And then Goldman Sachs did something nobody expected.
This chapter hit me different than the rest of the book. Maybe because Sergey Aleynikov is from the former USSR, same as me. Maybe because I spent 20 years in IT and know what it feels like when non-technical people judge your work. Probably both.
The book ends the way it started. With a cable buried under American soil and the people who live above it having no clue what it does.
So we made it. Thirteen posts covering every chapter of Flash Boys by Michael Lewis. And now the big question: did any of it matter?