Rumpus Daily, 26 Sep 2026: Hormuz traffic still seen below normal into the new year

In this episode: WTI to settle above $92.99 on Monday; Inflation above 0.4% for September is still the market's base case; Hormuz traffic still seen below normal into the new year. Two stories today. Kalshi traders still expect a hot September inflation print, even after cutting those odds ten points overnight. And the oil market is pricing Monday's crude settle above the line, despite a day of diplomacy headlines pointing the other way.

Transcript

Opening

Sheema: Good morning and welcome to The Rumpus Daily. I'm Sheema Sharti.

Neil: And I'm Neil Matthews. Every weekday we bring you the signals from the world's prediction markets. Today is Saturday, September twenty-sixth.

Sheema: Two stories today. Kalshi traders still expect a hot September inflation print, even after cutting those odds ten points overnight. And the oil market is pricing Monday's crude settle above the line, despite a day of diplomacy headlines pointing the other way.

Neil: The Hormuz picture ties both of them together. Polymarket cut the chance of normal strait traffic by December thirty-first to twenty-three percent, and the oil ladder on Kalshi lifted its median Monday settle to around ninety-five dollars on the same day the press ran deal talk. The markets and the headlines disagree.

WTI to settle above $92.99 on Monday

Sheema: Start with crude. WTI, West Texas Intermediate, the US benchmark, settled at ninety-four dollars and sixty-one cents on Wednesday after Houthi strikes on Saudi Arabia lifted it about three percent. Kalshi's contract on whether Monday's November WTI future settles above ninety-two ninety-nine trades at sixty-eight percent, up twenty points in a day.

Neil: Sixty-eight feels low given where the settle already is. Does the ladder back that?

Sheema: It does. The ninety-three ninety-nine line trades at fifty-five percent, the ninety-two forty-nine line at seventy-two, the ninety ninety-nine line at eighty-six. The median of traders' expectations sits near ninety-five dollars.

Neil: So why is the headline contract as low as sixty-eight?

Sheema: The other side is a weekend report of a Hormuz deal shaving a few dollars off before Monday's open. Forexlive showed deal talk alone took roughly half of the Wednesday spike back within hours.

Neil: Does that hold up, though? The Houthis hit Yanbu. Yanbu is Saudi Arabia's Red Sea port, the route that lets Saudi crude bypass Hormuz entirely. Strikes there threaten the main workaround. That weighs heavier than talk.

Sheema: We call sixty-eight too low. A firm agreement naming a reopening date, or a Nymex settlement at or below ninety-two ninety-nine on Monday, proves us wrong.

Inflation above 0.4% for September is still the market's base case

Neil: September inflation next. Kalshi carries a contract on whether the consumer price index, the official monthly measure of price changes, rises more than zero point four percent in September. It trades at eighty-one percent, down ten points overnight. What moved it?

Sheema: Thursday's oil dip on diplomacy news. But that dip belongs to October's print, not September's. September's index is nearly complete. The drop looks like a thin market moving on the wrong headline.

Neil: The ladder makes that case. The zero point three rung trades at eighty-nine percent, the zero point five rung at fifty-five. That puts the median expected print between zero point five and zero point six. A reading above zero point four needs only a middling hot month.

Sheema: And the Fed is publicly weighing another rate rise before the midterms. That is not a central bank that sees September cooling.

Neil: We call eighty-one percent too low. The call fails if the official print, due by October fourteenth, shows a rise of zero point four or less.

Hormuz traffic still seen below normal into the new year

Sheema: The Strait of Hormuz. The narrow channel between Iran and Oman through which roughly a fifth of the world's seaborne oil passes has been running below normal since Iran's forces closed it earlier this year. Polymarket asks whether IMF Portwatch, the official ship-tracking service, logs a seven-day average of sixty ship arrivals at the strait on any date before December thirty-first. Sixty arrivals is the threshold for normal traffic. That contract trades at twenty-three percent.

Neil: It peaked at thirty-one percent on Friday before falling eight points. So traders bought the diplomacy story and then mostly sold it back. Is that rational?

Sheema: The Yanbu strikes say yes. The bypass is under fire. A war spreading to the Red Sea is not a war whose chokepoint is about to reopen. The October contract in the same event trades at six percent. Traders do not expect a recovery in the next five weeks.

Neil: What would change that?

Sheema: A phased-end agreement probably starts with the strait. Three months is enough for tankers to return. But for December you need Portwatch to publish a seven-day average of sixty or above, which is a sustained recovery, not a single spike.

Neil: We call twenty-three percent too generous. The early warning that we are wrong is the October contract crossing fifteen percent by October fifteenth. Every one of these markets has the same switch. A dated Hormuz reopening agreement would take the war premium out of crude, ease the Fed's case for a hike, and lift equities. Until that report exists, the premium stays in.

Close

Sheema: Neil, thanks very much.

Neil: Thanks, Sheema.

Sheema: That's The Rumpus Daily for Saturday, September twenty-sixth. We'll see you tomorrow.