In 1979, Hillary's trades in cattle futures contracts generated criticism regarding conflict of interest. Her initial $1000 investment generated a 10000% return by the time she ceased trading ten months later. Chicago Mercantile Exchange records indicated that $40000 of her profits came from larger trades ordered by someone else and shifted to her account, according to Leo Melamed, the former chair of the Chicago Mercantile Exchange.
Her lawyer and friend, James Blair, an experienced futures trader, directed her trading. According to records, the commodities broker that faciliated the trades allowed Clinton to maintain her positions even though she did not have enough money in her account to cover her activity. He reportedly did so because her friend Blair was a good client. The firm was later fined for violating Chicago Mercantile Exchange rules governing margin trading. However, Melamed concluded that she had not broken exchange rules.
http://en.wikipedia.org/wiki/Hillary_Clinton