High-frequency trading has been good to billionaire Ken Griffin.
The $830m pool, which added other strategies in recent years, beat the 44% gain of the U.S. stock market in the six years through 2013 as well as Griffin’s two main hedge funds, which together have $8.8bn in assets and rose 45% in the period.
The returns of Citadel’s Tactical Trading fund give a glimpse of the fortunes made in high-frequency trading - the rapid buying and selling of securities that relies on ultrafast computers to exploit market inefficiencies - following the financial crisis, and before profits shrank with increasing competition. The practice is facing unprecedented scrutiny following Michael Lewis’s latest book, 'Flash Boys', which argues that it has helped rig the U.S. stock market.
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