U.S. stocks rose sharply Monday, the Dow Jones industrial average rose 465.83, or 1.7 percent, to 28,148.64. The broader Standard & Poor's 500 index rose 60.18, or 1.8 percent, to 3,408.62. The technology-heavy Nasdaq composite index rose 257.47, or 2.3 percent, to 11,332.49.