Wall Street Rallies as Crude Oil Slump Eases Inflation Fears, Treasury Yields Fall

U.S. stocks closed sharply higher on Monday, September 21, 2026, buoyed by declining Treasury yields and a steep drop in crude oil prices that eased investor concerns over inflation. The slump in oil prices provided relief to markets that have been sensitive to energy-driven inflationary pressures, while lower Treasury yields made equities more attractive relative to fixed income. The rally was broad-based, with major indexes posting solid gains as investors rotated back into risk assets. Sliding crude prices also raised hopes that headline inflation readings could moderate in the near term, potentially influencing Federal Reserve policy expectations.