Who he is and what he did Edward Thorp was born in August 1932, in the middle of the Depression. He grew up in a working-class family with parents on defense-industry shifts, which left him and his brother mostly on their own. He was an early reader who found most of his interests were shared only by adults, and he started earning money young: Kool-Aid for a penny a glass, then a paper route. He did a physics PhD, switched into math, and ended up an instructor at MIT, then New Mexico State, then UC Irvine. Along the way he worked out how to beat blackjack, built a wearable computer to beat roulette with Claude Shannon, and then moved into markets. There he priced warrants and options, ran what he describes as the first quantitative market-neutral hedge fund, and compounded at roughly 19 to 21 percent a year for decades. Both hosts open by stressing how extreme the record is: 227 profitable months out of 230. Blackjack and gambling In 1959 he read a statistics paper on a near-break-even blackjack strategy and took a $10 gamble on a Vegas trip. At the table he noticed that neither the players nor the casino understood the game. The key insight was that the deck isn't reshuffled after every hand, so as cards leave, the odds shift. He had a computer remove four aces and saw the casino's edge jump by almost three percent, which told him that a deck rich in aces and tens favors the player. He then needed an IBM 704 at MIT because the calculation was far too large to do by hand. The rest was betting: big when the deck favors you, small when it doesn't. The AMS abstract committee assumed he was a crank, since theorems said casino games couldn't be beaten. A member who knew him vouched for him. Manny Kimmel then bankrolled a $10,000 trip, and Beat the Dealer became a bestseller. He says gambling was the best training ground for investing, because it teaches you to compute odds, manage money, and act when you have an advantage. Mathematics and probability He shows an instinct for turning a vague belief into a calculation. The roulette idea came from physics: the ball orbits like a planet, so if you can measure the position and velocity of the rotor and ball, you can predict a useful region of the wheel. The warrant idea came from realizing that most of the uncertainty in a warrant's price comes from the underlying stock and the time left. In the transcript he says he derived the option formula himself by reasoning about the hedge, and that it matched Black and Scholes when their paper came out in 1973. He is also very comfortable with the limits of probability: in markets you often know the payoffs but not the probabilities, so you estimate a distribution and think through how bad things could be compared to your most likely case. If even the bad case looks good, he says, you have something worth playing.