Buffett's Berkshire Hathaway lost $4B after Kraft Heinz earnings report

Warren Buffett's taste for junk food is starting to give him major indigestion. The folksy billionaire who regularly grabs McDonald's for breakfast saw his Berkshire Hathaway conglomerate lose more than $4 billion on Friday as its stake in Kraft Heinz got clobbered on a dismal earnings report. Shares of the snack-food giant -- in which...