Warren Buffett Is Sitting on a Record $334 Billion in Cash Because One Aspect of His Investment Philosophy Is Non-Negotiable
The Oracle of Omaha hasn't been buying much -- including his favorite stock -- for more than two years for a very good reason.

Few money managers command the attention of professional and everyday investors quite like Berkshire Hathaway's (NYSE: BRK.A)(NYSE: BRK.B) chief, Warren Buffett.
Since the Oracle of Omaha became CEO of Berkshire 60 years ago, he's overseen a cumulative return in his company's Class A shares (BRK.A) of more than 6,340,000%, as of the closing bell on March 18. For the sake of comparison, the benchmark S&P 500 (SNPINDEX: ^GSPC) has gained around 37,300%, inclusive of dividends, over the same timeline. When you run circles around the stock market's benchmark index by this wide of a margin, you're going to draw a crowd.
Berkshire Hathaway CEO Warren Buffett. Image source: The Motley Fool.