After all, having Warren Buffett as a new shareholder goes a long way for advertising value. So what happens when investors find out that it wasn’t really Buffett who bought the shares? In a CNBC interview with Becky Quick, Buffett. Because insurance is such an important business for Berkshire, and a major catastrophe could have a significant impact on its earnings, CNBC’s Becky Quick pressed Buffett again. the parent of…