On March 31, 2026, global markets experienced remarkable rallies across all four major U.S. benchmark stock indices, demonstrating significant gains that marked the best daily performance since May 2025. The S&P 500 jumped by 2.9%, the Nasdaq 100 surged by 3.4%, the Dow Jones Industrial Average rose by 2.5%, and the small-cap Russell 2000 also posted a gain of 3.4%.
This explosive upward momentum in the U.S. stock market was spurred by a wave of optimism surrounding the potential de-escalation of the ongoing five-week conflict between the United States and Iran. Iranian President Masoud Pezeshkian communicated with European Council President António Costa, expressing Iran’s willingness to consider an end to the hostilities, albeit contingent upon receiving certain guarantees. This revelation indicated that the Iranian leadership might be open to engaging in negotiations, further fueling market optimism.
Later in the trading day, U.S. President Trump made comments suggesting the conflict could conclude within two to three weeks, stating that the U.S. had achieved its military objectives. His remarks hinted at the possibility that the reopening of the vital Strait of Hormuz, a crucial passage for oil shipments, might not be necessary for the resolution of the war.
Anticipation was building ahead of President Trump’s scheduled official speech on the situation in Iran, set for April 1 at 9 p.m. Washington time, as announced by the White House’s press office.
Market analysts observed that the recent gains in major U.S. indices could also be attributed to short-covering and potential month-end quarter-end adjustments, coinciding with a favorable end to the quarter. However, a closer examination through technical analysis indicates that these rallies may represent a mean reversion rebound, often referred to as a “dead cat bounce,” rather than signaling the beginning of a sustainable medium-term bullish trend.
As the world watches developments in Iran and the potential impact on geopolitical stability, investors remain cautious yet hopeful regarding the trajectory of the markets in the coming weeks.
