1. Warren Buffett has raised over $158 billion in cash/cash equivalents this year and has continued to sell stocks in Q4. 2. Recent filings show that Berkshire sold another $36 billion in stocks in Q3 and plowed operating earnings into short-term Treasuries as well. 3. Theories for Buffett's selling include overvaluation in mega-cap stocks, a recession warning, or stockpiling money for potential acquisitions.