Benzinga's Volume Movers (ACOR, AUXL, MDSO, SONO)

Acorda Therapeutics Inc ACOR shares moved up 6.69% to $29.52 at 11:11 am. The volume of ACOR shares traded was 322% higher than normal. ACOR reported Q4 sales of $55.7 million from its Ampyra drug. Auxilium Pharmaceuticals Inc AUXL shares rose 13.95% to $23.45. The volume of AUXL shares traded was 270% higher than normal. AUXL reported its preliminary Q4 financial results and 2011 sales guidance. Medidata Solutions Inc MDSO shares climbed 4.30% to $25.21. The volume of MDSO shares traded was 224% higher than normal. PharPoint Research Inc has joined MDSO's ASPire to Win channel partner program. SonoSite Inc SONO shares gained 5.50% to $33.00. The volume of SONO shares traded was 165% higher than normal. SONO projected its Q4 revenue of $89 million, up from analysts' estimates of $83.71 million. Read more from Benzinga's Markets.