Morning Market Losers

shares fell 18.45 percent to $41.92 after jumping 185.56 percent on Friday.

shares declined 18.18 percent to $0.900. Crude oil futures fell 1.64 percent to trade at $58.65 a barrel.

shares dropped 12.14 percent to $7.31. BTIG Research downgraded MBIA from Buy to Neutral.

shares slipped 9.92 percent to $24.70. BTIG Research downgraded Assured Guaranty from Buy to Neutral.

shares dipped 9.81 percent to $13.70. Vitae Pharmaceuticals announced the initiation of Phase 1 autoimmune study and reported top-line results from metformin arm of ongoing Phase 2 clinical trial of BI187004/VTP-34072 in overweight type 2 diabetics.

shares fell 4.53 percent to $10.56 after dropping 3.32 percent on Friday.