How are discounts boosting Olive Garden owner Darden Restaurants? And how did an activist investor lift government contractor KBR? Plus, why did Berkshire Hathaway’s bets boost three companies? Host Karen Langley discusses the biggest stock moves of the week and the news that drove them.

Sign up for the WSJ's free Markets A.M. newsletter. 

Learn more about your ad choices. Visit megaphone.fm/adchoices