Texas-based home builder D.R. Horton Inc.’s shares fell Friday, the same day a report indicated that in November Americans bought new homes at the fastest pace since 2010. An S&P gauge of home builders retreated 0.7 percent even after the better-than-expected data. The index of pending home sales climbed 1.7 percent to 106.4, the highest since April 2010, after a revised 5 percent gain in October, the National Association of Realtors said. Analysts expected a 1 percent advance.