U.S. stocks rebounded sharply on Tuesday, partially recovering from the brutal selloff during the previous session, as China's central bank cut interest rates. The S&P 500 opened up 41 points, or 2.2%, to 1,934. The Dow Jones Industrial Average gained 364 points, or 2.2%, to 16,220 at the open. The Nasdaq Composite began the day up 131 points, or 3% at 4,660.
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