Remember Herbalife (HLF)? That was the firm engaged in some very, very sketchy sales practices (basically a giant pyramid scheme) that Bill Ackman had shorted. His archenemy, Carl Icahn, went into a very public war with Ackman, since Icahn was very long HLF. Eventually, Ackman couldn’t take it anymore, and he gave up the fight right near the peak.





