NEW YORK, Oct 20 (Reuters) - U.S. stocks gained modestly at the open on Wednesday as the focus returned to corporate earnings and as fears dissipated about the effect of an interest rate increase in China.
* The Dow Jones industrial average added 37.47 points, or 0.34 percent, to 11,016.09. The Standard & Poor's 500 Index put on 4.32 points, or 0.37 percent, to 1,170.22. The Nasdaq Composite Index gained 11.23 points, or 0.46 percent, to 2,448.18.