Jim Simons, legendary hedge fund manager who cracked the market, dead at 86

Jim Simons, the legendary hedge fund manager who founded the prolific Renaissance Technologies, died on Friday, according to the foundation he started.

The MIT math professor and former NSA codebreaker was 86 years old.

"Jim was an exceptional leader who did transformative work in mathematics and developed a world-leading investment company," Simons Foundation president David Spergel said in a statement.

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