NEW YORK — Technology companies are leading U.S. stocks higher at the open Friday, led by a sharp gain for chipmaker Intel. Investors continue to monitor developments in the international effort to contain the deadly new virus outbreak in China. The S&P 500 rose 4 points, or 0.1%, to 3,330 and the Nasdaq rose 37 points, or 0.4%, to 9,439. The Dow Jones Industrial Average gained 108 points, or 0.4%, to 29,268. Dow component American Express rose nearly 5% after posting strong fourth-quarter results. Bonds rose and the yield on the 10-year Treasury fell to 1.72% from 1.74% a day earlier.
