Benzinga's Top Pre-Market Losers

Achillion Pharmaceuticals Inc

shares fell 11.23% to $7.35 in the pre-market trading. Analysts at JMP Securities downgraded Achillion Pharmaceuticals from “outperform” to “market perform.” Kellogg Company

moved down 5.56% to $50.99 in the pre-market session. Kellogg lowered full-year earnings forecast. MGIC Investment Corp

dipped 4.89% to $3.50 in the pre-market session. MGIC Investment posted a narrower first-quarter loss. Wal-Mart Stores Inc

dipped 2.96% to $60.60 in the pre-market session. WMT's trailing-twelve-month profit margin is 3.51%.