The Warren Buffett Indicator is less mysterious than it sounds. It might as well be called the common-sense indicator. It’s simply the relationship between gross domestic product (GDP)—or the sum total of a country’s economic activity—and the value of stocks in the S&P 500. So, in simpler terms, the Warren Buffett Indicator in terms of Wall Street measures market capitalization versus U.S. GDP. If we believe warren buffett predictions a stock market crash in 2017 is meant to happen.