Reports: Weekly jobless claims, 7:30 a.m.; Fourth-quarter productivity, 7:30 a.m.; ISM service sector index for January, 9 a.m.; Factory orders for December, 9 a.m.; Freddie Mac releases weekly mortgage rates, 9 a.m.; Retailers release sales data for January.

Major earnings: AutoNation Inc., Cigna Corp., CVS Caremark Corp., Dow Chemical Co., Estee Lauder Cos., Kellogg Co., Las Vegas Sands Corp., MasterCard Inc., Merck & Co., New York Times Co., Reynolds American Inc., Starwood Hotels & Resorts Worldwide Inc., Viacom Inc.