The U.S. stock market came under intense selling pressure in December as fears of a major policy mistake by the Federal Reserve gripped markets. The U.S. stock market experienced one of the most volatile months in years as the S&P 500 index fell 9.1 percent in December as a slowing global economy, the effects of the ongoing trade war with China, and political uncertainty in the U.S. and Europe also weighed on markets. The decline occurred despite the S&P 500 having the largest single-day point gain in its history.

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