Morning Market Losers

Prana Biotechnology PRAN shares tumbled 70.79% to $2.88 on failed Phase 2 Alzheimer's trial results. Clean Diesel Technologies CDTI dipped 10.90% to $3.76 on Q4 results. Clean Diesel Tech posted a Q4 loss of $0.27 per share, versus analysts' expectations for a loss of $0.06 per share. MannKind MNKD shares fell 8.90% to $4.40 trading after dropping 7.12% on Friday. Guanwei Recycling GPRC shares dropped 7.12% to $3.00 after the company reported full-year 2013 results. Guanwei Recycling's 2013 net income slipped 18.05% to $9,699,497. Ocean Bio-Chem OBCI shares fell 6.73% to $2.91 after the company reported Q4 results. Ocean Bio-Chem reported its Q4 earnings of $0.04 per share on revenue of $7.80 million. GenCorp GY shares fell 3.76% to $17.90 after the company reported Q1 results. GenCorp reported a Q1 loss of $0.03 per share. BlackBerry BBRY slipped 3.51% to $8.11 after falling 7.07% on Friday. Analysts at Credit Suisse downgraded BlackBerry from neutral to underperform and lowered the target price from $7 to $6. General Motors Company GM shares declined 1.76% to $34.12. Federal regulators twice declined to open formal investigations into GM cars with faulty ignition switches, according to the Wall Street Journal.