Morning Market Losers

HORSEHEAD HOLDING CORP. ZINC dropped 25.33 percent to $8.55 after the company issued an update on operations at its Mooresboro, North Carolina zinc production facility. Silicom Ltd. SILC shares declined 23.19 percent to $27.96 after the company updated its second quarter guidance. The company expected Q2 revenue of $16.8 million to $17.2 million. Allot Communications Ltd ALLT shares dipped 15.96 percent to $5.95. Allot Communications issued a weak Q2 and FY revenue guidance. Energy XXI Ltd EXXI shares slipped 9.96 percent to $2.08 after falling 7.23 percent on Thursday. Aetna Inc AET shares declined 5.95 percent to $118.04 after the company announced its plans to acquire Humana Inc HUM in a cash-and-stock deal valued at $35 billion. JD.Com Inc(ADR) JD dropped 4.90 percent to $31.50 after declining 0.36 percent on Thursday. Clean Energy Fuels Corp CLNE shares slipped 2.70 percent to $5.22 after dropping 0.56 percent on Thursday.