Trump Orders Naval Blockade of Strait of Hormuz: Markets Tumble as Oil Surges Past $100

Key Takeaways

• Trump directed the US Navy to blockade the Strait of Hormuz effective Monday at 10 a.m. ET
• Dow futures plummeted up to 580 points before moderating; S&P 500 and Nasdaq futures declined approximately 0.5–0.7%
• Crude oil prices jumped above $100 per barrel, with Brent climbing as much as 9%
• Tehran denounced the blockade as “an act of piracy” and vowed to strike Persian Gulf ports
• First quarter bank earnings reporting begins Monday with Goldman Sachs

US equity futures experienced significant declines Monday morning following President Donald Trump’s declaration of a US Navy blockade targeting the Strait of Hormuz, a critical artery for global oil shipments.

The directive followed the weekend collapse of US-Iran peace negotiations in Islamabad. This diplomatic breakdown extinguished a brief window of hope that had propelled markets to their strongest weekly performance of 2026.

Futures for the Dow Jones Industrial Average plunged as much as 580 points before moderating to approximately 300 points down, representing a 0.7% decline. Both S&P 500 and Nasdaq 100 futures retreated between 0.5% and 0.7%.

Crude oil markets reacted dramatically to the development. Brent crude surged as high as 9%, approaching $104 per barrel, before easing slightly to settle above $101. West Texas Intermediate futures advanced more than 8%, exceeding $104 per barrel.

Tehran issued a swift response to Trump’s declaration, threatening to attack all Persian Gulf ports should its energy infrastructure face assault. Iranian officials characterized the blockade as “an act of piracy.”

Inflation Concerns Resurface Amid Energy Price Spike

The sharp increase in oil prices reignited worries about inflationary pressures. Elevated energy costs can ripple through the broader economy, potentially dampening consumer spending and overall economic expansion.

Gold futures declined 0.7% to $4,756 per ounce. The US dollar strengthened 0.3% versus a basket of global currencies. The 10-year Treasury note yield climbed one basis point to 4.33%.

The three primary stock indices had recently completed their strongest weekly gains of 2026, buoyed by a tentative ceasefire that now appears increasingly fragile. Market observers indicated investors were recalibrating equity valuations given the uncertain trajectory of Middle Eastern tensions.

Despite the downturn, certain analysts highlighted that futures had recovered from session lows, indicating traders remained cautiously optimistic about potential diplomatic solutions.

Corporate Earnings Season Launches

Market focus was simultaneously shifting toward the opening of first quarter earnings reports. Goldman Sachs was scheduled to release results Monday.

JPMorgan Chase, Citigroup, Bank of America, Wells Fargo, and Morgan Stanley were all slated to announce earnings throughout the week. Netflix and PepsiCo were also expected to publish quarterly results.

The Strait of Hormuz represents a narrow maritime passage situated between Oman and Iran. Approximately 20% of global oil supplies transit through this chokepoint, establishing its significance to worldwide energy markets.

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