HerbaLife Rises Close to 17% in Regular Trading Hours

Hedge fund manager David Einhorn did not mention HerbaLife HLF in his presentation today at the Ira Sohn Conference. Shares of HerbaLife spiked more than 5% on this news during regular trading hours. Shares then traded as much as an additional 4% higher during after-hours trading.

Before Einhorn spoke, investors speculated that he might pitch a short sale of HerbaLife, given that he appeared to have a negative perspective on the health product provider when he spoke on its May 1st earnings conference call.

David Einhorn manages Greenlight Capital, a long/should hedge fund. If he spoke negatively about the stock, traders may have interpreted it as a signal that his hedge fund has a short position on the stock. Since he did not mention Herbalife, he offered no such signal.