The S&P 500 ended its worst day in a week on Tuesday, retreating from four-year highs after the U.S. Federal Reserve said it was less inclined to provide more economic stimulus.

Based on the latest available data, the Dow Jones industrial average <.DJI> slipped 65.32 points, or 0.49 percent, to end unofficially at 13,199.40. The Standard & Poor's 500 Index <.SPX> fell 5.79 points, or 0.41 percent, to finish unofficially at 1,413.25. The Nasdaq Composite Index <.IXIC> shed 6.13 points, or 0.20 percent, to close unofficially at 3,113.57.

(Reporting by Caroline Valetkevitch; Editing by Jan Paschal)