Oil Just Broke $100 a Barrel. Is a Fed Rate Hike Now Guaranteed Next Week?
A U.S. strike on Iranian-linked oil tankers just sent Brent crude past $100 a barrel, landing six days before the most consequential Federal Reserve meeting in years and forcing Chair Kevin Walsh into a corner with no clean exit.
Brent crude punched through $100 a barrel on Wednesday morning, hours after U.S. forces struck oil tankers linked to Iran’s Islamic Revolutionary Guard Corps operating near the Strait of Hormuz. It is the first time the global benchmark has held that level since the brief late-July spike that pushed Brent to $105.32 on July 23 before fading. This time the move looks stickier, and it lands six days before a Federal Open Market Committee meeting that was already the closest call in years. The question sitting on Chair Kevin Walsh’s desk has shifted to whether to hike.
A 43% Move in Nine Weeks
The scale of the repricing is the story. Brent traded at $68.53 on July 2 and has climbed roughly 43% since, driven by a stop-start conflict around the world’s most important oil chokepoint. West Texas Intermediate, the U.S. benchmark, has tracked the same path: $91.48 on September 1, up 9.0% in a week and 6.2% in a month, with a 52-week high of $114.58 set on April 7 during the earlier phase of the Hormuz crisis. It sits at $95.36 today. The Energy Information Administration’s May outlook assumed the strait would reopen and prices would fall to an average of $89 a barrel by the fourth quarter. That forecast is now stale.
The pass-through to households is already visible. National average gasoline sits at $4.22 a gallon today — the highest price for September ever — well inside the range the EIA’s own guidance flags as painful for family budgets, and that reading predates this week’s move in crude. Bond markets are treating the oil shock as an inflation event. The 10-year Treasury yield closed at 4.78% on September 4, its 98th percentile of the past year and up 15 basis points in a month.
Why Walsh’s Committee Is Cornered
The Fed cut its target range three times between September and December of last year, taking the upper bound from 4.5% to 3.75%, and has held there ever since. Core PCE, the Fed’s preferred inflation gauge, climbed to 130.658 in July, the highest reading in the past year. Headline CPI hit 332.813 in July, near a record. Add a jobs report that the Wall Street Journal described as strong enough to revive rate-hike bets, and the case for a preemptive hike writes itself.
Traders are now pricing it. Polymarket’s contract on the September FOMC decision shows a 52.5% probability of a 25 basis point increase, with no change at 45.5%. A month ago, those odds were roughly reversed: the hike contract has gained $0.15 and the no-change contract has lost $0.15 over the past 30 days. A cut is essentially off the table, priced at under 1%.
What to Watch on September 16
A hike would be the first upward move in this cycle and a stark repudiation of the easing path Walsh’s predecessor set last fall. The stakes are material. Mortgage rates, corporate refinancing costs, and equity multiples all sit on the 10-year yield, which is already at cycle highs. The specific signal to watch is the dot plot: whether the median projection for year-end 2026 moves above 4%, and whether Walsh uses the press conference to describe the oil move as a supply shock the Fed should look through, or as an inflation impulse it must lean against. If it is the latter, Wednesday’s tanker strike will have rewritten U.S. monetary policy for the next year.
Contact [email protected] for any questions or corrections.






