Some shoe investors are heading for the hills over worries connected to lowered earnings guidance from Under Armour , Allbirds and Crocs after the three posted earnings results this week.

Under Armour Inc.’s first quarter report on Friday sent shares down 17.2 percent in mid-afternoon trading, or $1.08, to $5.19, after company founder, president and CEO Kevin A. Plank said the expectation is an additional $100 million in added costs from tariffs, an amount that will make its turnaround efforts that much harder. The net loss was $3 million, on a 4 percent revenue decline to $1.1 billion. Footwear sales were down 14 percent to $266 million, while apparel sales decreased 1 percent to $747 million. Looking ahead to the second quarter, the company projected a revenue decline by 6 to 7

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