By Herbert Lash NEW YORK (Reuters) -U.S. stocks rose, then slumped while Treasury yields surged and then fell as markets reacted wildly to a bleak economic picture next year after the Federal Reserve adhered to a tough stance to fight inflation by hiking interest rates. The three main stock indices jolted up and down, the yield on benchmark 10-year Treasury notes spiked to 3.6401% and the dollar surged to a fresh two-decade high after the Fed raised interest rates by 75 basis points as expected. The Fed also said in a statement following a two-day meeting of policymakers that it expects its po…