NEW YORK—The U.S. dollar index recovered after falling on Tuesday as volatile oil prices impacted the euro and markets grappled with the significance of talks between Russia and Ukraine and indications that COVID-19 lockdowns will crimp economic growth in China. The dollar index against major currencies was up less than 0.1 percent in the New York afternoon as markets awaited statements on Wednesday from the U.S. Federal Reserve after a meeting on monetary policy. The euro was last down less than 0.1 percent to $1.0933 after having been up nearly 0.5 percent. The British pound was up 0.2 percent to $1.3027. The Japanese yen continued trading at its weakest levels to the dollar in five years as the greenback gained 0.1 percent to 118.335 yen. The dollar index had lost nearly 0.5 percent overnight after oil prices fell below $100 a barrel, bolstering the euro. The index recovered after oil turned up from …