Market probability: ~47%
ProbGap forecast: 64%
Gap: +17 percentage points
Resolution: September 30, 2026

Saudi Arabia's East–West Pipeline has become a critical piece of the global oil market.

After attacks forced the system offline, prediction markets are now pricing whether it will return to operation before the end of September.

The market currently puts that probability at roughly 47%.

ProbGap thinks that is too low.

Our forecast: 64% chance that the East–West Pipeline is operational by September 30.

Market: ~47%
ProbGap: 64%
Gap: +17 pp

The key distinction is simple:

The market does not require a complete repair or a return to full capacity.

Partial or reduced-capacity operation is enough.

That materially changes the probability.

The East–West Pipeline allows Saudi crude to travel from the country's eastern oil fields to the Red Sea port of Yanbu, bypassing the Strait of Hormuz.

That alternative route has become especially important during the current disruption to Middle Eastern energy flows.

Before the shutdown, the pipeline had recently been carrying roughly 4–5 million barrels per day.

Saudi Arabia has already been forced to adjust exports following the outage, including moving more crude through alternative routes.

Reuters reported today that Saudi Arabia has increased deliveries through Oman's Sohar port, which has helped ease some immediate supply concerns. Brent crude nevertheless remains above $107 per barrel.

The economic incentive to restore at least some pipeline capacity is therefore substantial.

Some estimates for repairing the pipeline have stretched into several weeks.

If the Polymarket contract required the entire system to be fully repaired and restored to normal capacity by September 30, a probability below 50% would be much easier to justify.

But that isn't the relevant threshold.

The contract can resolve Yes if the pipeline resumes partial or reduced-capacity operation.

That distinction is central to our forecast.

A system can remain damaged while still moving enough crude to qualify as operational.

U.S. Energy Secretary Chris Wright said on September 15 that the pipeline should be back in operation “within days.”

That is dramatically more optimistic than some of the physical-repair estimates circulating after the attack.

It doesn't mean he will be right.

Detailed damage assessments remain uncertain, and full restoration could still require weeks.

But there is a big difference between:

full repair → several weeks

and

some qualifying operation → potentially much sooner.

That gap between the two is where we think the market may be mispricing the contract.

We see three broad scenarios.

Rapid partial restart. Saudi Arabia restores limited flow through unaffected sections, temporary repairs or parallel infrastructure within days. This would likely satisfy the contract.

Restart later in September. The initial “within days” estimate proves optimistic, but engineers restore enough functionality before the September 30 deadline.

Pipeline remains shut. Damage is more extensive than expected, repairs encounter delays, or further attacks disrupt the restoration effort.

The third scenario is meaningful enough that we are nowhere near 80–90%.

But given the contract's relatively low threshold for Yes and the urgency surrounding Saudi exports, we think 64% is the better estimate.

Operational by September 30: 64%
Still shut down: 36%

Market probability: ~47%

This is not a forecast that the pipeline will be completely repaired by September 30.

It is a forecast that Saudi Arabia will restore enough operation to meet the market's resolution criteria.

That's a much easier hurdle.

And we think the market is currently underestimating the difference.

Our probability would move lower if Saudi authorities confirm that critical infrastructure cannot support even limited operation before October.

Further attacks would also materially reduce the probability.

On the other hand, reports of pressure testing, limited crude flow or an official announcement that part of the system has restarted could move the probability sharply higher — or resolve the market entirely.

That makes this an unusually clean ProbGap case.

The deadline is close.

The resolution criteria are clear.

And our estimate differs materially from the market.

Market: ~47%
ProbGap: 64%
Gap: +17 pp

Forecast published September 16, 2026.