Edward Thorp: The Math Professor Who Beat Blackjack and Wall Street

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In the early 1960s a mathematician sat at Nevada blackjack tables in wraparound sunglasses and a fake beard, quietly proving that the house could be beaten. This episode follows Edward O. Thorp from a tinkering childhood, when he became a certified ham radio operator at 12, through a physics degree and a 1958 PhD in mathematics at UCLA. As a professor he taught himself Fortran to run blackjack simulations on an IBM 704 and showed that the game has a memory: when low cards leave the deck, the odds tilt toward the player.

Thorp paired that insight with the Kelly criterion, a formula for sizing bets to grow a bankroll without courting ruin, then tested it with money from gambler Manny Kimmel. Casinos answered by shuffling early, so he moved on: first to roulette, where he and Claude Shannon built a hidden computer, and then to Wall Street. There he treated investor panic as a source of mispricing and pioneered the market neutral, quantitative approach to trading.

Backed by $10,000 from Manny Kimmel, Thorp won $11,000 in a single weekend of casino play.
His 1962 book Beat the Dealer sold more than 700,000 copies and took probability research straight to the public instead of an academic journal.
The roulette device he built with Claude Shannon in 1960 and 1961 used a toe switch to time the ball and sent a tone to a hidden earpiece predicting where it would land.
No law covered such machines when they used it, and Nevada did not ban electronic devices in casinos until 1985.
Thorp ran Princeton Newport Partners from 1969 to 1989, reported a 20 percent average annual return over 28.5 years, and in 1991 judged Bernie Madoff's results mathematically impossible.

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