Stocks closed lower on Tuesday, dragged down by Walgreens Boots Alliance (WBA), which cut its earnings expectations.
Shares of Walgreens dropped 12.8% after the US and UK drug store giant reported earnings and sales that missed forecasts. It also issued a weak profit outlook for the rest of the year. Shares of rival CVS (CVS) also closed down 3.8%.
Shares of Delta Air Lines (DAL) were up 6% after the airline upped its forecast for the first quarter.
The mixed trading day comes after the Dow soared 330 points on Monday to close at its highest level since October.