US stock futures swing as oil drops 9% in 2026

What moved markets in the latest session

U.S. crude oil futures for May delivery fell 9.8% to $15.37 a barrel, while international benchmark Brent for June delivery dropped 9.1% to $10.38 a barrel. In equity futures, Dow Jones Industrial Average futures were up 524 points, or 1.1%. S&P 500 futures and Nasdaq futures posted gains of 0.8% and 0.9%, respectively. The simultaneous move of lower oil and higher index futures pointed to shifting expectations around energy supply risk and near-term inflation pressure.

Iran war remains the central risk factor

Market moves have been repeatedly linked to developments around the Iran war and access through the Strait of Hormuz. The situation has remained volatile, with reports of more American troops headed to the Middle East and Iran denying that negotiations were taking place. The war’s tempo was described as high, with both sides firing intense barrages and thousands more U.S. Marines reported to be on their way to the Gulf. The Strait of Hormuz has been a key pressure point for shipping and energy markets, given its role in global crude and LNG flows.

Strait of Hormuz: shipping conditions and official messaging

Iran told International Maritime Organization member states that “non-hostile vessels” may transit the Strait of Hormuz if they coordinate with Iranian authorities, according to a Financial Times report that cited a letter. In that letter, Iran’s foreign ministry said Tehran had taken “necessary and proportionate measures” to prevent aggressors and supporters from exploiting the strait for hostile operations. At the same time, reporting also described a “chokehold” that snarled international shipping and sent fuel prices higher, underscoring how quickly market pricing can change with operational access.

Oil’s recent spike before the sharp drop

The latest decline in crude comes after an earlier surge in prices tied to supply fears. Brent futures previously settled $1.55, or 4.55%, higher at $104.49 a barrel. U.S. West Texas Intermediate climbed $1.22, or 4.79%, to $12.35. Separately, another report described WTI surging more than 8% to above $104 per barrel while Brent rose 7.5%, following announcements and developments linked to Hormuz restrictions.

Trump’s blockade threat and the impact on risk sentiment

One flashpoint for markets was President Donald Trump’s statement that the U.S. Navy would begin efforts to block ships entering or leaving the Strait of Hormuz. U.S. Central Command later confirmed it would begin blocking maritime traffic to and from Iranian ports starting at 10 a.m. ET on Monday, while adding that vessels traveling to or from non-Iranian ports would not be affected. A separate account also cited Trump reiterating warnings that the U.S. would target Iran’s infrastructure if the strait was not reopened, including a comment at a news conference: “They have ’til tomorrow,” alongside his note that he extended the deadline to Tuesday.

Diplomacy efforts and why talks mattered to markets

Diplomatic efforts were described as struggling at several points. One report said high-level talks in Pakistan failed to produce an agreement, with Vice President JD Vance citing Iran’s unwillingness to commit to abandoning nuclear weapons development. Iran’s Foreign Minister Abbas Araghchi accused Washington of shifting demands and wrote on X: “Good will begets good will. Enmity begets enmity.” Another update cited The Wall Street Journal, saying negotiators were not optimistic about reaching a deal before an 8 p.m. ET deadline set by Trump.

India-US engagement and the focus on keeping the strait open

Indian Prime Minister Narendra Modi and U.S. President Donald Trump discussed the Middle East situation and the importance of keeping the Strait of Hormuz open, according to posts on X by U.S. envoy to India Sergio Gor and Modi. Modi wrote: “India supports de-escalation and restoration of peace at the earliest. Ensuring that the Strait of Hormuz remains open, secure and accessible is essential for the whole world.” The messaging highlighted the broader economic stakes for energy-importing countries when shipping lanes face disruption.

Key market numbers at a glance

Market impact: energy, equities, and inflation sensitivity

Energy prices have been the key transmission channel from geopolitics into markets, with oil moving sharply on news about shipping access and military actions. The reported disruption to flows has been described as severe, with the International Energy Agency calling it the biggest-ever oil supply disruption in the context provided. Equity index performance reflected competing forces: concerns about higher energy-driven inflation and hopes that talks could reduce escalation risk. Futures pricing also showed how quickly sentiment can reverse, with reports describing both steep overnight declines and subsequent rebounds in different sessions.

Why this matters for investors tracking US and global markets

The pattern across the updates is consistent: headlines tied to Hormuz access and military posture have driven large swings in both crude and equity index futures. The numbers show that even when equity futures are higher, oil can move violently in either direction as perceived supply risk changes. For investors, the situation raises the importance of monitoring official statements and operational updates, especially those affecting maritime traffic rules and any deadlines tied to reopening the strait.

What to watch next

The next market catalyst remains the evolution of negotiations and any confirmed changes to shipping rules through the Strait of Hormuz, including enforcement details tied to the announced U.S. measures. Investors will also track further official communication from Washington and Tehran, particularly around deadlines and any stated conditions for reopening or restricting maritime routes. With crude already demonstrating double-digit percentage moves across sessions, the direction of energy prices is likely to remain a key driver of broader risk sentiment.