U.S. stocks fell sharply Tuesday, The Dow Jones industrial average fell 457.21, or 1.9 percent, to 23,764.78. The broader Standard & Poor's 500 index fell 60.20, or 2.05 percent, to 2,870.12. The technology-heavy Nasdaq composite index fell 189.79, or 2.1 percent, to 9,002.56.