Stocks closed broadly higher on Wall Street Wednesday, adding to the market’s gains this week ahead of the Christmas holiday. The S&P 500 rose 1 percent after coming back from an early slide. The other indexes also recovered after sliding into the red in the early going. The Dow Jones Industrial Average rose 1.1 percent and the Nasdaq closed 1.2 percent higher. The Russell 2000, a measure of small-company stocks, rose 0.9 percent. Every major U.S. index is still on track for weekly gains after a choppy several days where stocks bounced between sharp losses and solid gains. “We’ve had strength yesterday and today, so the markets are generally positive this week following a fair amount of pressure last week,” said Terry Sandven, chief equity strategist at U.S. Bank Wealth Management. The S&P 500 rose 47.33 points to 4,696.56. The index is now within 0.4 percent of the all-time high …