The U.S. stock market is in its biggest bubble IN HISTORY and it's going to end in a disastrous crash. It's inevitable and nothing can stop it. The chart below shows Warren Buffett's favorite indicator, the total U.S. stock market capitalization-to-GDP ratio, which confirms that the market is far more overvalued than it was during the 1999 dot‑com bubble that ended in a devastating bear market, and this one will end the same way.