Childhood chess whiz and former Deutsche Bank trader founded Saba Capital Management in 2009, now with more than $5 billion under management. Made his reputation in bonds and credit derivatives, but at age 38, Weinstein drove Saba to net returns of 9% last year in part with successful bets on stocks including Clorox, Cisco Systems and Conagra. He is a trustee of Natan, a New York-based philanthropy whose grant-making focuses on the Jewish community and Israel. He graduated from the University of Michigan. He is the son of Giselle Weinstein and Stanford Weinstein of Manhattan. His father retired as the owner of an insurance brokerage bearing his name in Brooklyn.