Benzinga's Top Pre-Market Losers

Rigel Pharmaceuticals RIGL shares fell 30.96% to $5.82 in the pre-market trading. Rigel Pharmaceuticals' trailing-twelve-month ROE is -45.82%. Endo Health Solutions ENDP shares dropped 6.38% to $25.84 in pre-market trading. Endo cut its earnings view for 2012 and 2013. Ciena CIEN dipped 1.73% to $15.30 in the pre-market session. Ciena posted a wider fiscal fourth-quarter loss. Canadian Solar CSIQ dipped 1.33% to $2.97 in the pre-market session. Canadian Solar named Guangchun Zhang as its Chief Operating Officer.