Warren's worried. Should you be too?

Frothy

Warren Buffett has been selling shares and stacking up cash at a terrific rate, fanning speculation as to why the world's foremost stock picker is pulling his money out of the market. Berkshire Hathaway roughly tripled its pile of cash, Treasury bills, and other liquid assets to a record $325 billion over the two year. It accounted for at least 27% of Berkshire's $1.15 trillion of assets at quarter end — the largest proportion in many years. Here are some "frothy" observations that should make us all worried about near term stock performance.

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