 Shares of Under Armour Inc. UAA, -0.73 were up more than 3 in premarket trading Monday after Stifel analyst Jim Duffy turned bullish on the apparel makers stock, upgrading it to buy from neutral. Relative inventory management discipline leaves Under Armour with better margin certainty and in a better position to bring newness to market in CY23 and we expect systematic risk from an inventory glut of larger competitors clears by 2H, Duffy wrote in a note to clients. 