pyramid scheme

Icahn Buys Big Stake in Herbalife, Heats Up Feud With Ackman

A clash between Wall Street titans is flaring again Friday after Carl Icahn grabbed a 13 percent stake in Herbalife, a supplement company that Pershing Square Capital Management's William Ackman shorted heavily and publicly, calling it a massive pyramid scheme.

Mitt Romney's Money Man: Who Is Frank VanderSloot?

We've profiled two wealthy benefactors behind GOP candidates for president: Sheldon Adelson, who bankrolls Newt Gingrich's super PAC, and Foster Friess, whose millions support Rick Santorum. Now we turn our focus to Frank L. VanderSloot, the billionaire backing Mitt Romney.