Benzinga’s Top Pre-Market Losers (MDVN, VISN, CMED, CPNO)

Medivation, Inc. (NASDAQ: MDVN) decreased 69.81% to $12.15 in the pre-market session after Pfizer (NYSE: PFE) and Medivation announced results from two Phase 3 trials of the investigational drug dimebon (latrepirdine) in patients with Alzheimer's disease. MDVN has gained over 60% in the last six months.

VisionChina Media Inc (NASDAQ: VISN) tumbled 29% to $5.82 in the pre-market session after VisionChina Media reported yesterday a fourth-quarter net income of $5.63 million or $0.08 per share from $14.82 million or $0.20 per share for the same quarter last year. VISN closed at $8.20 in the last trading session. The 52-week trading range for VISN is $4.80 - $12.27.

China Medical Technologies, Inc. (ADR) (NASDAQ: CMED) plunged 10.10% to $13 in the pre-market session. China Medical Technologies reported today a net loss for the third quarter as compared with a profit in the corresponding period prior year. The 52-week trading range for CMED is $11.41 - $26.07. China Medical Technologies has climbed over 10% in the last year.

Copano Energy, L.L.C. (NASDAQ: CPNO) plunged 5.38% to $22.88 in the pre-market session. Copano Energy announced yesterday that it plans to sell 6,300,000 common units representing limited liability company interests in an underwritten public offering pursuant to an effective shelf registration statement on Form S-3 previously filed with the Securities and Exchange Commission. CPNO closed at $24.18 in the last trading session. In the last six months, CPNO has surged over 64%.