The major U.S. stock indices closed higher on Wednesday, with the Dow Jones Industrial Average leading the way, adding 645.47 points (+1.31%) to close at 50,009.35. The S&P 500 and Nasdaq Composite also posted gains, up 79.36 points (+1.08%) and 399.65 points (+1.54%), respectively, to close at 7,432.97 and 26,270.36. The broad-based rally was driven by easing fears around interest rates and oil prices, as well as optimism surrounding the potential resolution of the Iran war. Treasury yields and oil prices saw significant declines, contributing to the risk-on tone. Investors were also closely monitoring Nvidia's upcoming earnings report, which could provide further insights into the tech sector's performance.

The headlines highlighted the positive sentiment, with several sources noting the Dow's jump of more than 600 points and the broader rally in the S&P 500 and Nasdaq Composite. The improvement in oil prices and a retreat in Treasury yields were cited as key factors supporting the market. Additionally, optimism around the Iran war and the potential for a resolution to the conflict added to the positive outlook. Notable movers in the tech sector included Nvidia, Micron, and Intel, which saw gains as investors awaited the company's earnings report. The airline sector also performed well, with several airlines reporting strong results. Overall, the market session was characterized by a risk-on tone, with investors taking advantage of the favorable macroeconomic environment to push stocks higher.