Herbalife (HLF) rallied after boosting full-year earnings forecasts as sales in China showed strength. The nutrition company has struggled with accusations it is a pyramid scheme from hedge fund manager Bill Ackman. Groupon (GRPN) narrowed its quarterly losses, though revenue missed expectations. Alexion Pharmaceuticals (ALXN) will acquire Synageva BioPharma (GEVA) in a cash and stock deal worth $8.4 billion. Stocks were slightly higher Wednesday as crude oil touched $62 a barrel, its highest level this year and its best since early December. Commodities were rallying as the U.S. dollar dipped. The ADP jobs report missed estimates.