U.S. stock index futures extended gains on Wednesday after consumer prices data came largely in line with expectations, easing some concern about faster-than-expected policy tightening by the Federal Reserve. At 8:33 a.m. ET, Dow e-minis were up 147 points, or 0.41 percent, S&P 500 e-minis were up 18 points, or 0.38 percent, and Nasdaq 100 e-minis were up 70.75 points, or 0.45 percent. Moments before data, Dow e-minis were up 94 points, or 0.26 percent, S&P 500 e-minis were up 10.5 points, or 0.22 percent, and Nasdaq 100 e-minis were up 55.5 points, or 0.35 percent.