BALTIMORE ( Stockpickr) -- It's one thing to follow the moves of some of the world's most successful investors -- but how about the smartest? According to the Financial Times, Jim Simons is just that. The founder of hedge fund manager Renaissance Technologies, Simons earned the moniker of world's smartest billionaire while generating legendary returns at its off Wall Street campus.Renaissance Technologies isn't like most Wall Street firms because it doesn't hire Wall Street types; only scientists need apply. Simons himself holds a Ph.D. in mathematics and was the chairman of Stony Brook University's math department until 1978 when he entered the investing world full time. Today, around a third of Renaissance's employees are Ph.D.s whose expertise ranges from astronomy to physics. It's a system that's worked well for the firm, which boasts a 2,478% cumulative return since 1999. Here's a look at some of the new positions Renaissance Technologies added to its portfolio last quarter.
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