Benzinga's Top Pre-Market Losers

GenMark Diagnostics

dipped 6.93% to $10.21 in the pre-market session after the company lowered its annual revenue forecast. Randgold Resources

shares fell 2.23% to $73.12 in the pre-market trading. Randgold's trailing-twelve-month ROA is 11.78%. Clearwire

dipped 1.73% to $4.55 in the pre-market session after Sprint

filed a complaint against DISH

and Clearwire. American International Group

shares dropped 1.44% to $44.50 in pre-market trading after the company's subsidiary expanded its order for CFM International's LEAP-1A engines.