Joel Greenblatt (born December 13, 1957) is an American academic, hedge fund manager, investor, and writer. He is a value investor, alumnus of the Wharton School of the University of Pennsylvania, and adjunct professor at the Columbia University Graduate School of Business. He runs Gotham Funds with his partner, Robert Goldstein. He is the former chairman of the board of Alliant Techsystems (1994-1995) and founder of the New York Securities Auction Corporation. He is also a director at Pzena Investment Management, a high-end value firm.
His is investment philosophy is to select long and short stock portfolios for his funds based on valuation the companies within his research universe of U.S. large and mid-cap companies. Subject to a rigorous set of risk controls, he buys those companies at the biggest discount to his assessment of value and shorts those companies selling at the biggest premium to his assessment value.(Source: Wikipedia, Gotham Funds)