US markets mixed ahead of Fed decision and oil prices jump as Middle East violence flares

US markets showed mixed performance ahead of the Federal Reserve's interest rate decision, while oil prices surged over 4% due to renewed violence in the Middle East as Jordan and the U.S. intercepted Iranian missiles. Global stock indices were mixed, with South Korea's Kospi falling 6% driven by declining chipmaker shares, and the Fed is expected to maintain current rates despite inflation remaining above 2%.