U.S. Markets open in 1 hr 32 mins

All 30 Dow stocks fall ahead of the open

Tomi Kilgore

The premarket selloff in Dow Jones Industrial Average components is unanimous, with all 30 stocks losing ground, as Dow futures tumble 220 points. The biggest decliner is UnitedHealth Group Inc. shares , which slumped 2.8%. Just behind was Walgreens Boots Alliance Inc.'s stock , which fell 2.4% after the drug store chain reported fiscal fourth-quarter earnings that beat expectations but sales that missed. The most active stocks ahead of the open were Apple Inc.'s , which shed 1.8%, and Microsoft Corp.'s , which lost 1.7%.