U.S. stocks opened little-changed on Tuesday, as investors remained cautious ahead of the two-day Federal Reserve policy meeting and a barrage of earnings reports. Shares of McDonald's Corp slumped after the world's largest fast-food restaurant chain missed earnings expectations. Lower oil prices continued to weigh on energy stocks. The S&P 500 index was flat at 2,168. The Dow Jones Industrial Average was off by 11 points, 0.1% to 18,481, while the Nasdaq Composite Index began the session unchanged at 5,096.
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