Warren Buffett's Berkshire Hathaway took a $5 billion hit on its airline stocks last quarter

· *Warren Buffett's Berkshire Hathaway took a $5 billion hit from airline stocks in the first quarter as the novel coronavirus hammered demand for flights.*
· *The billionaire investor's company owns more than 8% of all four major US airlines.*
· *Shares in American, Delta, Southwest, and United plunged by an average of 52%...