War Talk Sends Dow Stocks 1.3% Lower Barron’s There was something familiar about the stock market's downturn. In 1950, the S&P 500 dropped 5.8% in the month before U.S. troops landed in Korea in response to the North's invasion of the South. Two months later, the index had gained back 4.2%. 5 things that could trip up stocks in SeptemberUSA TODAY