Investors follow Warren Buffett's moves carefully, but he makes surprisingly few moves overall. A typical hedge fund has thousands of stocks that get traded frequently, but Berkshire Hathaway is a holding company with a different approach to its equity portfolio.Warren Buffett has called himself a business picker, not a stock picker, and looks to maximize gains over the long term by investing in high-quality companies. He concentrates on a small number of stocks, typically around 45, that he has confidence ...