Saudi Pipeline Odds Collapse to 35% — We’re Cutting Our Forecast

Market: 35%
ProbGap forecast: 48%
Gap: +13 percentage points
Previous ProbGap forecast: 64%
Status: Forecast revised

The market has moved sharply against a September restart of Saudi Arabia’s East–West Pipeline.

Polymarket now prices a restart by September 30 at just 35%, while the October 31 contract trades around 75%.

We think that move contains real information.

And after reviewing what has changed since our previous 64% forecast, we are cutting our probability substantially.

But not all the way to the market.

ProbGap now assigns a 48% probability that Saudi Arabia officially announces the East–West Pipeline is operational — including at partial or reduced capacity — by September 30.

That is down 16 percentage points from our previous 64% estimate.

Against the market's 35%, the revised forecast still leaves a +13 percentage-point gap.

The key distinction is important: this market does not require full restoration of the pipeline.

Under the resolution rules, partial or reduced operation qualifies, but Saudi Arabia's government must announce that the pipeline is actually operating. Reports that repairs are progressing or that a restart is expected do not qualify.

That combination — a relatively low operational threshold but a strict confirmation requirement — is central to our forecast.

Several developments have weakened the original case.

First, the damage appears more serious than the most optimistic early assessments suggested.

The attack damaged three pumping stations, and reporting now points to full restoration potentially taking around six weeks. Saudi Aramco is reportedly working toward a partial restart sooner, but the timeline remains uncertain.

Second, Aramco's behavior increasingly suggests it is planning around a prolonged disruption rather than assuming an immediate return to normal operations.

The company is preparing roughly 60 million barrels of exports through Ras Tanura and ship-to-ship transfers near Sohar during September and October, helping compensate for reduced Red Sea exports through Yanbu.

Aramco has also halted October crude deliveries to at least some European refiners following the pipeline attack.

Neither development proves that a partial September restart will fail.

But both reduce the weight we place on the fastest-recovery scenario.

The security situation has also deteriorated.

Saudi Arabia confirmed that Houthi forces attempted attacks on several locations on September 19, including civilian infrastructure in Yanbu. The Houthis separately claimed to have targeted Aramco facilities there, although Saudi authorities said the attacks were thwarted and no evidence has established that the claimed Aramco strikes succeeded.

This matters because Yanbu is not incidental to the forecast.

It is the Red Sea terminus of the East–West system.

Even if repair or bypass work proceeds on schedule, continued attacks increase the probability of delays, precautionary shutdowns or a slower return to operation.

That risk was not adequately reflected in our previous 64% estimate.

There is also a danger of moving too far in the opposite direction.

The strongest bullish fact remains that full repair is not required for this market to resolve Yes.

Saudi Aramco is working on a bypass around the damaged pumping stations. Reuters reported that Aramco was aiming for a partial restart within days, while U.S. Energy Secretary Chris Wright publicly said he expected the restoration timeline to be measured in days rather than weeks.

Even more importantly, the market's own term structure tells an interesting story.

The probability is approximately:

September 22: 8%
September 30: 35%
October 31: 75%

So traders are not primarily pricing permanent or very long-term damage.

They are pricing timing risk.

The market effectively believes there is a substantial chance the pipeline returns shortly after the September deadline rather than before it.

That is precisely where our disagreement sits.

We think the combination of bypass work, the fact that partial operation qualifies, and Saudi Arabia's economic incentive to restore the Red Sea route gives the September window somewhat more probability than the current 35% price implies.

But the evidence no longer supports our old 64% confidence.

Our revised probability:

48% YES by September 30

Market:

35%

ProbGap gap: +13 percentage points

This is no longer the +29 point apparent gap created by comparing today's market with our old forecast.

That would be misleading.

New information changed the underlying probability, so our forecast has changed with it.

But after incorporating that information, we still believe the market has moved slightly too far toward the pessimistic scenario.

The next decisive signal is straightforward.

An official Saudi announcement confirming even partial operation would resolve the September contract Yes.

Conversely, evidence that bypass construction has slipped into October — or another successful attack on the pipeline/Yanbu infrastructure — would push our estimate materially lower.

For now:

Market: 35%. ProbGap: 48%. Gap: +13 pp.

The market changed.

So did our forecast.

Just not by quite as much.