Benzinga's Top #PreMarket Losers

INSYS Therapeutics (NASDAQ: INSY ) shares fell 19.20% to $36.45 in the pre-market trading after the company received subpoena from Office of Inspector General. Anadarko Petroleum (NYSE: APC ) dipped 10.36% to $75.00. Anadarko disagreed with the Judge's Memorandum of Opinion in Tronox Adversary Proceeding. Citigroup downgraded Anadarko