Benzinga's Top Pre-Market Losers

Metabolix Inc

shares fell 45.74% to $3.25 in the pre-market trading. Archer Daniels Midland Co

reported that it will end a biodegradable plastics joint venture with Metabolix. JDA Software Group Inc

moved down 14.36% to $28.09 in the pre-market session. JDAS issued weak fourth-quarter revenue forecast. Diamond Foods Inc

dipped 10.35% to $29.70 in the pre-market session. Federal prosecutors have opened a criminal inquiry into DMND's walnut payments, the Wall Street Journal reported. Copano Energy LLC

dipped 4.30% to $33.84 in the pre-market session. CPNO announced the commencement of a public offering of 4,500,000 common units.