Warren Buffett's Berkshire Hathaway lost more than $4 billion in a single day after shares of Kraft Heinz — one of the investor's largest holdings — plunged on slew of bad news including a dividend cut and a government investigation. Stock of the packaged food giant, whose products include Heinz Tomato Ketchup, Jell-O and Kraft Macaroni & Cheese, plunged more than 28 percent Friday. And for Berkshire — which owned more than 325 million shares at the end of 2018 — the losses are steep. At current levels, Berkshire Hathaway is down $4.4 billion on paper in Friday's session alone. Kraft is Berkshire's sixth-largest ... (full story)