41. David Einhorn
bpoy david einhorn

Founder and president, Greenlight Capital

Overheard on Wall Street this year: "You've been Einhorned." No one moves markets quite like hedge fund manager David Einhorn, best known for publicly shorting (and quickly sinking) stocks he deems unworthy. Take Herbalife (HLF), the nutritional supplement company that saw its stock plunge 20% one day last May when Einhorn raised questions about the company on a conference call with analysts and investors. Since then, his words have sent Chipotle (CMG) tanking, given GM (GM, Fortune 500) and Cigna (CI, Fortune 500) a nice boost, and have become so potent that the Wall Street Journal studied, in earnest, the "Einhorn Effect." (He's also won $4 million playing poker.) That's enough cultural currency to make up for his own fund's middle-of-the-pack performance -- it's up 13.2% this year through September -- and being slapped with an $11 million fine for insider trading in January. --EF

- Last updated November 30 2012 05:12 PM ET
Join the Conversation
Amazon's Jeff Bezos: The ultimate disrupter

He's a pro-customer, tightfisted risk-taker who is conditioning Wall Street to embrace his erratic earnings. If you're running a business with high margins - watch out.

Market indexes are shown in real time, except for the DJIA, which is delayed by two minutes. All times are ET. Disclaimer LIBOR Warning: Neither BBA Enterprises Limited, nor the BBA LIBOR Contributor Banks, nor Reuters, can be held liable for any irregularity or inaccuracy of BBA LIBOR. Disclaimer. Morningstar: © 2014 Morningstar, Inc. All Rights Reserved. Disclaimer The Dow Jones IndexesSM are proprietary to and distributed by Dow Jones & Company, Inc. and have been licensed for use. All content of the Dow Jones IndexesSM © 2014 is proprietary to Dow Jones & Company, Inc. Chicago Mercantile Association. The market data is the property of Chicago Mercantile Exchange Inc. and its licensors. All rights reserved. FactSet Research Systems Inc. 2014. All rights reserved. Most stock quote data provided by BATS.