The escalating conflict with Iran has pushed average U.S. gasoline prices past the $4-per-gallon mark, with diesel surging to $5.13, according to the latest data. The price jump comes as crude oil markets price in heightened geopolitical risk, and prediction markets now give a 15.5% chance that crude will hit a new all-time high by the end of the year.
At the pump
Regular gasoline now costs more than $4 nationally for the first time since the summer of 2022. That's a sharp climb from the $3.60 range seen just a month ago. The increase is being felt hardest in states that rely on West Coast refineries, where prices already topped $5 in some areas. But the national average crossing the $4 threshold is a psychological marker that tends to ripple through consumer confidence and political debate.
The price spike is directly tied to the Iran situation. Traders are pricing in the risk of supply disruptions from the Strait of Hormuz, a chokepoint for about a fifth of the world's oil. Even without a physical blockade, the threat of escalation has added a risk premium to every barrel.
Diesel's steep climb
Diesel has been hit even harder. At $5.13 a gallon, it's now more than a dollar above regular gasoline. That matters because diesel powers the trucks that move food, goods, and construction materials. Higher diesel costs feed into the price of almost everything on store shelves. The spread between diesel and gasoline has widened to levels not seen in years, reflecting tight global diesel supplies and strong demand from Europe, which is scrambling to replace Russian fuel.
U.S. diesel inventories have been running below the five-year average, and the current crisis is making it harder to rebuild them. Refineries are already running near capacity, and any further disruption could push prices even higher.
What the prediction market says
On prediction markets, traders see a 15.5% probability that crude oil will reach a new all-time high by December 31. The current all-time high for West Texas Intermediate crude is $147.27, set in July 2008. A 15.5% chance is not a sure thing, but it's a meaningful bet given the volatility already priced in. For context, before the Iran conflict escalated, that probability was below 5%.
If crude does hit a new record, gasoline and diesel would almost certainly follow. The U.S. has limited tools to respond quickly. The Strategic Petroleum Reserve is at its lowest level since the 1980s after last year's historic drawdown. The White House has urged domestic producers to drill more, but output has been slow to rise.
For now, drivers and truckers are left watching the headlines from the Middle East. The next few weeks will show whether the 15.5% bet pays off — or whether diplomacy can cool the market before the pump price climbs even higher.
