Major stock indexes reached record highs on Tuesday, fueled by optimistic forecasts from companies like Caterpillar. The Dow Jones Industrial Average surged 907.47 points, or 1.71%, to 54,085.88, while the S&P 500 gained 136.02 points, or 1.79%, closing at 7,736.52. The Nasdaq Composite also saw a significant rise of 671.10 points, or 2.59%, to 26,584.99. These gains were attributed to stronger earnings and positive investor expectations, according to Oliver Pursche, a senior analyst.

Oil prices experienced a sharp decline, with Brent crude futures falling $4.41, or 5.3%, to settle at $79.36 a barrel, its lowest since July 13. U.S. West Texas Intermediate futures dropped $4.57, or 5.7%, to settle at $75.77 a barrel, also a three-week low. This drop was primarily due to comments from Qatari and U.S. officials, including U.S. Secretary of State Marco Rubio and Treasury Secretary Scott Bessent, suggesting progress toward a diplomatic resolution to the Iran war that could facilitate oil flows through the Strait of Hormuz.

The prospect of a deal to reopen the Strait of Hormuz, potentially as early as Tuesday or Wednesday, eased concerns about oil supply and inflation, which in turn contributed to falling bond yields. The yield on the 10-year Treasury fell to 4.62% from 4.70% the previous day. Asian markets also reacted positively, with MSCI's broadest index of Asia-Pacific shares outside Japan up 0.1% and South Korean shares rallying 2.1%, although Japan's Nikkei 225 slid 0.3%.