Oil heads for a weekly close above $100 as diesel sets a record

Oil prices rose on Friday, leaving both major benchmarks on track to end the week above $100 a barrel for the first time since mid-May¹. The weekly gain was the steepest since July, with prices close to $110¹. Brent has been trading firmly above $100 a barrel as attacks between the United States and Iran escalate in the Middle East².

The move has been fast and uneven. Crude topped $102 during the week alongside multi-year highs in Treasury yields³, and the BBC reported oil jumping to $105 a barrel amid signs the Iran war will not be resolved quickly⁶.

Refined products have moved further than crude. The national average price of a gallon of diesel jumped over $6 for the first time ever, according to AAA⁴. At $6.0556 a gallon, diesel is about 14% more expensive than a month earlier and over 60% more expensive than a year earlier⁴.

Why it matters to investors

Diesel is the fuel that moves freight, so its price feeds through to shippers, businesses and consumers rather than staying inside the energy complex⁴. Inflation data released on Thursday already showed sharp spikes in transportation costs⁴.

The bottleneck is not only barrels in the ground. Energy Secretary Chris Wright said refining is now a bigger problem than oil itself, pointing on Face the Nation to a long stretch of policy decisions behind the shortfall⁵. Wright separately said in early September that just under 11 million barrels a day of crude and refined products were currently moving².

Supply from the cartel is not filling the gap either. A Reuters survey found that OPEC oil output fell in August⁷. Higher energy costs are landing at the same time as multi-year highs in bond yields, a combination that showed up in weaker equity futures during the week³.

What to watch

The first variable is the war itself. Both the move above $100 and the jump to $105 were tied directly to escalating US-Iran attacks and to the expectation that the conflict will not end quickly^2,6.

The second is refining capacity, which Wright has identified as the tighter constraint⁵. Crude coming off its highs would not necessarily bring diesel down with it, given the record already set at the pump⁴.

The third is the feedback loop into rates. Treasury yields extended multi-year highs on the same days crude topped $102³, and the sustained cost of freight is the most direct route from a Middle East conflict into a domestic inflation print⁴.