An S&P index of home builders slid 4.1 percent as D.R. Horton cautioned that weak employment growth could hurt sales of new homes. All 11 members of the Supercomposite Homebuilding Index dropped. D.R. Horton is the largest US home builder by volume. Beazer Homes, which is not on the S&P index, fell 17 percent on a wider-than-estimated loss.