Under Armour stock sinks after Spieth loss, Morgan Stanley downbeat outlook By: MarketWatch April 11, 2016 at 14:14 PM EDT Under Armour shares are down in Monday trading after Morgan Stanley said the company could have an earnings miss. Read More >> Related Stocks: Dick's Sporting Goods Inc GX Defense Tech ETF TJX Companies Under Armour Wal-Mart Stores, Inc.