U.S. stocks finished mostly higher in volatile trading Thursday. Dow Jones industrial average rose 160.35, or 0.6 percent, to 28,492.27. The broader Standard & Poor's 500 index rose 5.82, or 0.2 percent, to 3,484.55. Technology-heavy Nasdaq composite index fell 39.74, or 0.3 percent, to 11,625.34.