Under Armour Sinks as Tariffs, Sputtering Sales Hit Outlook (1)

Under Armour Inc. plummeted after forecasting worse-than-expected sales and profit for the current quarter, stalling a turnaround plan that was taking hold.

The Baltimore, Maryland-based brand said revenue for its second quarter is expected to fall between 6% and 7%. Analysts on average projected a drop of almost 3%.

Shares of the athletic-wear brand company dropped as much as 21% in New York. So far this year, the stock had declined almost 20% as of the close on Thursday.

US tariffs on imports and more cautious consumers have complicated operations for companies. Under Armour, which began a restructuring last year, ...