Benzinga's Volume Movers

OM Group Inc. OMG surged 9.36% to $29.95. The volume of OM Group shares traded 290% higher than normal. OM Group shareholder FrontFour Capital sent a letter to management about underperformance. Bitauto Holdings Limited BITA shares climbed 8.89% to $91.15. The volume of Bitauto Holdings shares traded was 263% higher than normal. Bitauto Holdings shares gained on announcement of investments by JD.com Inc JD and Tencent Holdings Ltd TCEHY. Helen of Troy LimitedHELE shares rose 8.97% to $72.55. The volume of Helen of Troy shares traded was 176% higher than normal. Helen of Troy reported higher Q3 earnings. Vince Holding CorpVNCE shares moved up 5.47% to $24.88. The volume of Vince Holding traded was 162% higher than normal. Vince Holding is expected to report its fourth quarter and fiscal year 2014 financial results on March 19, 2015.