Reports: Existing home sales for March, 9 a.m.; Crude oil inventories, 9:30 a.m.

Local earnings: Abbott Laboratories, USG Corp.

Other major earnings: Altria Group, American Express Co., AMR Corp., Apple Inc., AT&T Inc., Chipotle Mexican Grill Inc., Fiat SpA, Marriott International, Qualcomm Inc., Union Pacific Corp., Wells Fargo & Co., Yum Brands Inc.