US Markets Stage Sharp Comeback on Iran Ceasefire Relief; S&P 500 +2.76%

US equity markets staged a significant rebound on April 8 following the Iran ceasefire announcement and the associated drop in oil prices. The S&P 500 rose approximately 2.76%, with Dow, S&P 500, and Nasdaq 100 futures all up more than 2% in early trading. Speculative AI stocks led gains — Nvidia, Tesla, AMD, and Micron rose 4–10%. Delta Air Lines surged 12% after posting strong earnings. Oil prices fell sharply on reduced geopolitical risk premium, easing inflation concerns and supporting bond markets. The rally partially offset the 9–11% decline recorded during the prior week's tariff-driven selloff.