Morning Market Losers

Tower Group International

dropped 24.05% to $2.99 after the company announced the sale of its 10.7% equity stake in Canopius Group Limited. Compass Point downgraded the stock from Buy to Neutral. Jabil Circuit

plummeted 21.15% to $15.55 after the company reported downbeat fiscal first-quarter results and issued a weak outlook for its second quarter. Citigroup downgraded the stock from Neutral to Sell and lowered the target price from $24 to $14. Onconova Therapeutics

dropped 15.74% to $13.80 after the company announced the discontinuation of the Phase 3 ONTRAC study of intravenous (IV) rigosertib plus gemcitabine in front-line metastatic pancreatic cancer. China Nepstar Chain Drugstore

dropped 15.44% to $2.08. China Nepstar Chain Drugstore's PEG ratio is -4.69.