The Overnight Rate

The Fed can't pump oil

A hike is 80% likely on Wednesday. It lands on a price spike that started in a shipping lane.

MONDAY, SEP 14, 2026Issue 004

Inflation is always and everywhere a monetary phenomenon.

Milton Friedman, 1970

This week puts that to a test. The Fed is about to raise interest rates into a jump in oil prices that traces back to attacks on shipping in the Strait of Hormuz.

This week

Nothing on the data calendar today. The rest of the week is crowded.

A hold on Wednesday, at 18% (Polymarket), would be the surprise. A hike is the base case. The part worth reading closely is the statement, since 44% on two or more hikes means a lot of money doesn’t think Wednesday is the last one.

Who pays: the Fed can’t pump oil

A rate hike works by making borrowing more expensive. People and companies spend less, and prices cool, eventually. That works well when inflation comes from too much demand. It’s slow and blunt when inflation comes from a supply problem, and a strait where ships are still getting hit, with the main pipeline around it shut, is about as clear a supply problem as there is.

So Wednesday’s hike won’t do anything to the price of diesel. What it will do is make the credit card and the HELOC cost more, while fuel stays wherever the strait puts it. Households get a higher fuel bill and a higher borrowing bill in the same month.

The committee knows all of this. It hikes anyway because it’s worried the energy spike leaks into everything else: rents, wages, and the prices that don’t fall back when oil does. July PCE, the Fed’s preferred measure, was already 3.7% (CNBC) before crude’s latest move, and inflation has been above the 2% target since 2021.

Net net: a hike Wednesday is the base case, and gas and diesel will keep following whatever happens in the strait.

Headlines

Decision Wednesday at 2. Receipt at 2:31.

The Odds

MarketVenueOddsMove
Fed hikes 25 bps on Sept 16Polymarket80%+19
Two or more Fed hikes in 2026Polymarket44%+9
WTI crude closes above $100 todayPolymarket86%new
Iran-Oman Hormuz shipping agreement by Sept 30Polymarket20%new
Clarity Act signed into law in 2026Polymarket30%new

Get the morning issue by email

Who pays, who gets paid, what it costs you. Free every weekday morning, in one short read.

One address, nothing else. Unsubscribe any time. See our privacy policy.

Live numbers between issues: rates · savings and CD rates · T-bill auctions · card rates · T-bill calculator