Herbalife Shares Up 15% This Week, After 30% Fall

Herblife Ltd. (NYSE:HLF) is in the midst of a substantial rebound, as the aggressive short set against the company by Bill Ackman appears to falter. The rebound in the firm's stocks has been sustained throughout the latter half of this week.

It all changed on Christmas day for the firm. Between Ackman's presentation on the short on December 20 and market close on Christmas Eve, the firm's shares lost more than 30% of their value. Since the market reopened on December 26 to current prices, the firm's stock price...