 Citigroup Inc. lowered its position in shares of FutureFuel Corp. NYSE:FF by 37.8 in the fourth quarter, according to the company in its most recent filing with the SEC. The firm owned 12,529 shares of the energy companys stock after selling 7,618 shares during the quarter. Citigroup Inc.s holdings in FutureFuel were worth 155,000 at ... 