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On how Brad Katsuyama — who worked in New York for the Royal Bank of Canada — discovered the system was rigged

He has 25 traders working for him, he deals in hundreds of millions of dollars of shares every day, he takes risk in the market — and it's in early 2008 he senses something's wrong. What he senses is, when he looks at his trading screens ... his screens will tell him say, that there are 10,000 shares of Microsoft offered at $30 a share if he wanted to buy them.

And normally, up to this point in his life, if he hit his button and said "buy" he'd get the shares for $30 a share, but all of a sudden, when he hits the button on his computer terminal, the shares disappear. It's like someone knows he's trying to buy Microsoft and the price of Microsoft goes up before he can get it. He doesn't understand why this is happening and that's the beginning of the story.

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