U.S. stocks closed lower by about 1 percent on Tuesday after an unexpected move overnight by the People's Bank of China to depreciate the yuan by nearly 2 percent. The Dow Jones industrial average fell 212.33 points, or 1.21 percent, to 17,402.84. The S&P 500 index lost 20.11 points, or 0.96 percent, to 2,084.07. The technology-heavy Nasdaq composite index fell 65.01 points, or 1.27 percent, to 5,036.79.
