U.S. stocks were mostly lower Thursday. The Dow Jones industrial average fell 80.12, or 0.3 percent, to 27,896.72. The broader Standard & Poor's 500 index fell 6.92, or 0.2 percent, to 3,373.43. The technology-heavy Nasdaq composite index rose 30.27, or 0.3 percent, to 1,042.50.