Stocks were sharply lower after reopening following the Christmas break weekend. Crude oil prices dropped below $37 as another disappointing read on China's economy triggered fears of weakening demand for energy. Weight Watchers (WTW) shares climbed as 2015 rolled to a close. Investors bet the health and fitness program will see a bump in members this New Year's as customers make their yearly resolutions. Apple (AAPL) has filed papers against Samsung asking for $180 million in supplemental damages from a recently-settled patent case. Samsung already agreed to pay nearly $550 million for infringing upon Apple's smartphone designs. Pep Boys (PBY) agreed to a $947 million bid from Bridgestone after contemplating an offer from activist investor Carl Icahn.