Former hedge fund analyst and New Yorker staff writer Sheelah Kolhatkar joins us to discuss her book, Black Edge: Inside Information, Dirty Money, and the Quest to Bring Down the Most Wanted Man on Wall Street. Kolhatkar tells the story of billionaire trader Steven A. Cohen, who in the 1970s, pioneered a new kind of hedge fund, primarily by accumulating huge amounts of suspect information. His rise and fall provides insight into the transformation of Wall Street, and the U.S. economy.