One figure from Berkshire Hathaway's latest operating results appears to be a telltale sign of trouble to come for the stock market.

Wall Street is chock-full of recognizable analysts and fund managers. However, none has the ability to garner the attention of professional and everyday investors quite like the Oracle of Omaha, Warren Buffett.

Since grabbing the reins as CEO of Berkshire Hathaway ( BRK.A 1.10% ) ( BRK.B 1.17% ) 60 years ago, Buffett has overseen a 5,637,640% cumulative return in his company's Class A shares (BRK.A), as of the closing bell on Aug. 8. When you handily outperform the benchmark S&P 500 ( ^GSPC 1.13% ) -- the S&P 500 has gained approximately 42,500%, including dividends, over six decades -- you're bound to be noticed.

But as an investor

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