Warren Buffett wants to make an 'elephant-sized' purchase, but says 'prices are sky-high' - CNBC

Warren Buffett wants to make an 'elephant-sized' purchase, but says 'prices are sky-high'  CNBCWarren Buffett's Berkshire Hathaway posted a rare quarterly loss, undercut by Kraft Heinz  Fox BusinessLIVE: Warren Buffett's annual letter to Berkshire Hathaway shareholders  Yahoo FinanceBerkshire Hathaway battered by Kraft-Heinz woes, posting a Q4 loss and a $3 billion writedown  CNBCFalling stocks, Kraft Heinz trigger huge Berkshire loss  ReutersVie