US gasoline prices reached a record high for September at $4.15 per gallon, driven by geopolitical tensions in the Middle East. The surge reflects broader energy market volatility linked to the ongoing conflict in Iran.

Political Fallout

Sen. Elizabeth Warren (D-Mass.) attributed the price hike to President Donald Trump’s military actions in Iran, stating the costs are squeezing American families. She noted on X that prices are nearly $1 higher than a year ago.

Trump countered by blaming the former administration of Joe Biden. He argued that oil prices would "drop like a rock" once the conflict ends and urged other nations to "reimburse" the US for keeping the Strait of Hormuz open.

Market Data

AAA reported the national average gasoline price at $4.31 per gallon as of Monday, up from roughly $3.19 a year earlier. Diesel prices hit a record $6.20 per gallon.

Crude Oil Movement

WTI crude oil rose 1.11% to $102.52 per barrel. Brent crude advanced 0.13% to $106.61 per barrel.

ETFs tracking oil prices also gained:

• United States Brent Oil Fund (BNO): +1.29% to $62.16
• ProShares Ultra Bloomberg Crude Oil (UCO): +1.01% to $52.08
• United States Oil Fund (USO): +1.14% to $156.66

What the Numbers Show

The divergence between Warren’s cited figure ($4.15) and AAA’s data ($4.31) highlights varying real-time reporting benchmarks. Both figures confirm a significant year-over-year increase, with AAA data showing a rise of over $1.12 per gallon compared to the prior year.

Global oil markets tightened as Brent crude advanced 1.26% to $105.93 per barrel, driven by a critical pipeline shutdown in Saudi Arabia and diplomatic setbacks in the Middle East.

Geopolitical Triggers

The price surge coincided with Oman postponing a planned regional meeting with Iran in Salalah. Foreign Minister Badr Albusaidi stated the delay was "in the interests of consensus," though Muscat remains committed to dialogue. This comes as Iran and Oman negotiate joint management of the Strait of Hormuz, a strategic shipping route currently under pressure from regional tensions.

Simultaneously, Houthi forces advanced near Perim Island in the Bab el-Mandeb Strait, threatening Saudi Arabia’s fallback export route after conflicts effectively closed Hormuz. Crown Prince Mohammed bin Salman reportedly requested military assistance from President Donald Trump against the Houthis, though Trump offered only intelligence support rather than direct strikes.

Supply Constraints and Market Reaction

Saudi Arabia shut down its primary pipeline bypassing the Strait of Hormuz. Traders reported that Riyadh holds only five to seven days of stored oil at its Red Sea port of Yanbu if the pipeline remains offline. WTI crude rose 1.47% to $101.52 per barrel, while natural gas futures climbed 1.87% to $2.884 per MMBtu.

Equity markets reacted negatively to the energy supply shock and broader macroeconomic caution ahead of the Federal Reserve meeting.

Asian markets also declined, with South Korea’s KOSPI down 3.33% to 6,679.87 and Japan’s Nikkei 225 falling 1.15% to 63,274.01. The U.S. dollar index held steady at $99.179, up 0.09%.

What the Numbers Show

The divergence between equity performance and commodity prices highlights shifting risk preferences. While Dow futures showed minimal decline (-0.08%), Nasdaq 100 futures fell sharply (-1.27%), indicating that investors are disproportionately penalizing growth and tech sectors amid rising energy costs and AI-related jitters. The simultaneous rise in oil prices and fall in tech-heavy indices suggests capital is rotating away from rate-sensitive growth assets toward energy exposure or cash as geopolitical uncertainty rises.