U.S. stocks surged for a third consecutive day Wednesday. The Dow Jones industrial average rose 483.22, or 1.7 percent, to 29,290.85. The broader Standard & Poor's 500 index rose 37.10, or 1.1 percent, to 3,334.69. The technology-heavy Nasdaq composite index rose 40.71, or 0.4 percent, to 9,508.68.