Under Armour lost about $600 million in value after retailer Foot Locker said sales of Steph Curry's new shoe were softer than expected. Foot Locker CEO Dick Johnson said (via ESPN.com ) the Curry 3 “started off a bit slower than the previous models,” causing a sell-off in the stock market.

While the price of the shoe has increased from the Curry 2 and 2.5 shoes to $140, Johnson remains confident in Under Armour as a company. "We're optimistic that they [Under Armour] are going to be able to continue to keep that [footwear business] with some momentum behind it and certainly expand their footwear offerings," Johnson said.