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Monday, September 7, 2026 |
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The Last Page.
The last page, first.
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Iran Draws a New Map of the Strait of Hormuz
Two men described the same waterway this weekend, and one of them was holding a new map. About ten ships a day are now the whole argument.
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The story
Brent crude posted its best week since July, up more than 8 percent in five sessions.
American and Iranian forces resumed strikes at the start of September, after a month of quiet. US forces hit three Iranian tankers, and Iran hit back at ships tied to America.
On Sunday, Iran’s security council chief Mohsen Rezaei went on state television with a map. Any vessel entering a new restricted zone goes onto a sanctions list, he said. He added that the strait stays open only when America stops the “sabotage, threats and attacks.”
Energy Secretary Chris Wright says the oil is still moving, and credits the Navy for it. Rezaei says the lane is his to close. About ten commodity ships a day are making the transit now, the fewest since May.
US markets are closed for the holiday, and oil is not. The gas price you saw over the weekend was printed before all of it. Before Sunday, before the map.
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$97.77
Brent on Monday morning, and still climbing.
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10
Ships a day through the strait, on Sunday’s count.
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$5.599
The national diesel average on August 31, before last week.
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If the traffic count recovers
November 2026
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If the corridor gets signed
January 2027
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Best case
NOVEMBER 2026. The strait never closed. Navy escorts kept the tankers moving through the fall, and the corridor maps went unsigned.
Transit counts climbed back toward normal in October. Insurers kept writing war-risk coverage, at a price, after canceling it outright in March. Goldman’s other branch is the one that printed, the $80 barrel it named on Monday if exports normalize.
Diesel came off its highs before Thanksgiving. The heating bill that scared you in September lands closer to last winter’s. Boring, and cheaper by the gallon.
Hormuz normalized once already this year, and the premium came off within weeks. This ending has a precedent with a date on it.
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Worst case
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JANUARY 2027. The corridor got signed, and it runs like a toll booth. Iran manages the lane, Washington calls it illegal, and every captain has to pick a side.
War-risk coverage went first, the way it went in March on five days’ notice. Transits stayed in single digits all winter. Single digits, week after week.
OPEC+ had already returned its spare capacity to the market in September, so there was no cushion left to open. Wood Mackenzie’s March arithmetic held: about 13 million barrels a day sit behind that strait, and no cushion reaches them.
Diesel led, the way it always does. Every pallet and every gallon of heating oil carried the freight bill up with it. Your February statement showed it in the grocery line before the energy line.
And the Fed met on a fuel-led inflation print with no tool that reopens a waterway.
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Spare capacity
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The oil a producer can put back on the market fast. OPEC+ finished unwinding its voluntary cuts with the September increase, so most of that cushion is already pumping.
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How it ends
You get an open strait at a war price unless the daily transit count keeps sliding.
Both endings already have receipts this year. The strait was disrupted in the spring, and it reopened by summer. The premium came off, then it came back on in July when the strikes restarted.
What has not happened, across two rounds of this, is a closure. The Navy keeps the lane open. Iran has its own reasons to keep it open, because its barrels move through the same water.
So the cost shows up as freight instead of as a shutdown. Goldman told clients on Monday that the supply shock in diesel and natural gas runs bigger than the one in crude. A slow tax on everything that moves.
The diesel figure above was taken on August 31, before any of last week happened.
The channels that sold a closed strait in March got paid. So did the ones that sold the all-clear in July. Neither came back to reconcile.
Winter arrives on schedule either way.
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The hinge is the count of commodity ships moving through Hormuz each day. About ten made the transit on Sunday, the fewest since May. Back toward normal and the Energy Secretary’s version holds, deeper into single digits and the freight market writes your winter.
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Case closed: the summer all-clear
The promise. On July 2, Hormuz traffic was back to normal and the forecasts followed. A Reuters poll of 31 economists cut the 2026 Brent number from $90.44 to $84.50. WTI came down to $79.49, more than 6 percent off the May figure. Analysts at HSBC, LBBW and UniCredit were quoted on the easing.
The ending. Five days later the United States struck Iran again. The barrel gave back its whole return to pre-war prices. Brent now sits about 48 percent above where it traded a year ago.
That forecast lasted five days. |
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