Warren Buffett's company, Berkshire Hathaway, has not been a big buyer of stocks this year. Buffett appears to believe the market is overvalued. But that doesn't mean he still doesn't have high conviction in many stocks.

It is indeed interesting that Berkshire now holds $320 billion in cash vs just $272 billion in equity investments. Put another way, Buffett is holding more cash than stocks. "That’s a lot of firepower if markets see a sustained drop," notes Colas. "While Berkshire is not especially expensive, its multiple may be worrisome to a value investor ."

Warren Buffett is now sitting on more than $325 billion cash after continuing to unload billions of dollars worth of Apple and Bank of America shares this year and continuing to collect a steady strea