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Stock market today: Dow, S&P 500, Nasdaq futures waver as US, Iran harden stances

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Yahoo Finance

August 13, 2026
Stock market today: Dow, S&P 500, Nasdaq futures waver as US, Iran harden stances

The U.S. Strategic Petroleum Reserve has dropped below 300 million barrels for the first time since 1983 amid intense supply disruptions in the Strait of Hormuz. As hopes for a diplomatic resolution between Washington and Tehran fade, global crude prices have surged over 4%.

The Strategic Petroleum Reserve Crisis: A Historic Depletion

The United States is currently facing a critical juncture in its energy security as the Strategic Petroleum Reserve (SPR) has plummeted to 298.7 million barrels. This figure represents the lowest inventory level observed since January 1983. The decline, fueled by a sharp 6.1 million barrel reduction in a single week, underscores the severe strain placed on national emergency stockpiles due to the ongoing conflict involving Iran and the subsequent disruption of energy transit through the Strait of Hormuz.

The Impact of the Strait of Hormuz Standoff

The Strait of Hormuz, a vital maritime chokepoint, has become the epicenter of a global energy crisis. As Iran continues to restrict oil exports, the resulting supply shock has forced the U.S. government to utilize its emergency reserves to stabilize domestic and international markets. The Trump administration’s previous order to release 172 million barrels in March was a significant intervention, yet the continued closure of the waterway has necessitated further drawdowns, leaving the nation with less than 300 million barrels in reserve for the first time in over four decades.

Market Volatility and Price Surges

Financial markets have reacted sharply to the breakdown in diplomatic negotiations between Washington and Tehran. As hopes for a swift resolution to the Strait of Hormuz crisis fade, Brent crude and U.S. West Texas Intermediate (WTI) benchmarks have experienced significant volatility, with both rising over 4% to reclaim the $85 and $80 thresholds respectively. The failure of recent talks regarding new shipping lanes—complicated by mutual demands for compensation—has signaled to investors that the supply crunch is far from over.

Historical Context and Strategic Vulnerability

The SPR was originally established following the 1970s oil embargoes to provide a buffer against supply shocks. Reaching 1983-era levels of depletion highlights a significant shift in the strategic landscape. While the reserve is intended as an insurance policy, the current geopolitical environment has forced a transition from long-term storage to active market management, leaving the U.S. with a thinner margin of safety should the conflict in the Middle East escalate further.

Future Trends and Energy Outlook

Looking ahead, the trajectory of oil prices will remain inextricably linked to the diplomatic impasse in the Middle East. With Iran maintaining strict conditions for the reopening of the Strait of Hormuz, global inventories remain under extreme pressure. If the current trend of inventory depletion continues without a resolution to the transit crisis, the U.S. may face increased vulnerability to price shocks. Experts suggest that until a sustainable agreement is reached, energy markets will likely remain hyper-sensitive to any news regarding the security of international shipping lanes, potentially keeping prices at elevated levels for the foreseeable future.

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