U.S. stock indexes slipped Wednesday after the Federal Reserve opted not to cut interest rates for the first time since it began trying to help the economy through easier rates in September. The S&P 500 fell 0.

Who will drive the stock market as the Fed holds its first meeting of the year? This could be the worst day in nearly five years for the PHLX Semiconductor Index, led by major weakness in hot artificial-intelligence plays like Nvidia Corp.

By Ankur Banerjee, Rae Wee and Amanda Cooper LONDON/SINGAPORE (Reuters) -Technology shares steadied on Tuesday, led by a modest recovery in Nvidia after its record-breaking wipeout in market value in a rout sparked by a low-cost Chinese artificial intelligence model that may threaten the dominance of U.