U.S. equity markets closed sharply higher Friday, concluding a three-week rally fueled by the resumption of commercial shipping through the Strait of Hormuz and a robust corporate earnings season that has exceeded analyst expectations.

The S&P 500 rose 1.8 percent, while the Dow Jones Industrial Average gained 1.6 percent. The technology-heavy Nasdaq Composite outperformed with a 2.1 percent advance, according to data from the New York Stock Exchange.

The gains reflect growing investor confidence that recent military tensions in the Persian Gulf region are subsiding without triggering the sustained oil supply crisis many had feared just weeks ago.

Strait Reopens After Tense Standoff

The Strait of Hormuz, a narrow waterway between Iran and Oman through which roughly one-fifth of global oil supplies pass, reopened to commercial traffic this week following diplomatic negotiations that defused a military standoff in the region.

The strait had been effectively closed to tanker traffic for nearly three weeks after Iranian forces conducted military exercises that international shipping insurers deemed too risky for commercial vessels to navigate. The disruption sent Brent crude prices above $105 per barrel at one point, raising concerns about inflation and economic growth.

Oil prices have since retreated to approximately $88 per barrel as tankers resume normal operations through the waterway. Energy analysts note that the rapid normalization has prevented the kind of sustained supply shock that characterized previous Middle Eastern crises.

"The reopening removes a significant tail risk from the market," said Elena Vargas, chief market strategist at Meridian Capital. "Investors had priced in a worst-case scenario that simply didn't materialize."

Corporate Earnings Exceed Forecasts

Beyond geopolitical developments, equity markets have been buoyed by a stronger-than-anticipated earnings season. With roughly 60 percent of S&P 500 companies having reported first-quarter results, aggregate earnings growth is tracking at 8.2 percent year-over-year, well above the 4.5 percent analysts had projected at the start of the reporting period.

Technology and financial services sectors have led the outperformance, with several major banks reporting trading revenues that benefited from the period's market volatility. Consumer discretionary companies have also surprised to the upside, suggesting household spending remains resilient despite elevated interest rates.

The combination of geopolitical de-escalation and solid fundamentals has created what market participants describe as a "Goldilocks" environment—economic growth sufficient to support corporate profits without triggering aggressive monetary tightening from the Federal Reserve.

Lingering Uncertainties

Despite the rally, some analysts caution that significant uncertainties remain. The diplomatic framework that enabled the strait's reopening is fragile, and regional tensions could flare again with little warning. Additionally, the Federal Reserve has indicated it remains vigilant about inflation risks, particularly if energy prices prove more volatile than current futures markets suggest.

Bond markets reflected this caution Friday, with the yield on the 10-year Treasury note rising to 4.18 percent as investors reassessed the likelihood of near-term rate cuts. Fed funds futures now price in only a 35 percent probability of a rate reduction before September, down from over 60 percent a month ago.

Currency markets also showed mixed signals. The dollar strengthened against most major currencies, gaining 0.7 percent against the euro, as investors recalibrated expectations for diverging monetary policy paths between the Federal Reserve and the European Central Bank.

Broader Market Implications

The three-week rally has pushed the S&P 500 to within 3 percent of its all-time high reached in January. Market breadth has improved notably, with advancing stocks outnumbering decliners by nearly three-to-one on Friday—a technical indicator that suggests the rally has broadened beyond the narrow leadership of mega-cap technology stocks.

Volatility measures have declined sharply. The VIX index, often called Wall Street's "fear gauge," closed below 15 on Friday, its lowest level since early March and well below the 28 reading registered at the height of concerns over the Hormuz closure.

Energy sector stocks, which had surged during the supply disruption, gave back some gains Friday as oil prices continued their retreat. Major integrated oil companies fell between 2 and 4 percent, while renewable energy stocks advanced on expectations that policy focus may shift back toward energy transition initiatives.

The rally's sustainability will likely depend on whether the current geopolitical calm holds and whether upcoming economic data continues to support the narrative of resilient growth without accelerating inflation. Investors will be closely watching next week's release of durable goods orders and consumer confidence figures for signs that the economy is maintaining momentum into the second quarter.