Warren Buffett's latest moves have failed to impress investors, and he is now facing a growing chorus of criticism from all angles.
Critics have accused the Oracle of Omaha of being too cautious. They believe Berkshire Hathaway's enormous $140 billion cash mountain and Buffett's decision to stay out of the market when it crashed in March are signs that the billionaire investor is losing his touch.
Berkshire's performance over the past decade compared to the S&P 500 isn't very reassuring. Since the beginning of September 2010, the S&P 500 has outperformed Buffett's holding company by 40%.

