Following the last-minute cease-fire agreement between the United States and Iran, markets responded favorably. The agreement was met with optimism as it averted further escalations between the two countries. Stock markets saw significant gains, with the Dow Jones Industrial Average rising by over 500 points and the S&P 500 increasing by 2.5%. Investors were relieved by the news of reduced tensions, leading to a surge in market confidence and positive sentiment among traders.