Saudi Arabia will announce a coordinated OPEC+ production cut at the December 2026 ministerial meeting.

NEXUS forecast made 2026-09-07 at 21% probability. Pending, resolves by 2026-12-01.

OPEC+ Production Decision Bayesian equilibrium (38% narrow bargaining range, fragile stability, 'Saudi cuts production, US releases SPR') is fragile; however recent confirmed history shows OPEC+ rolling back cuts with a September hike, making a December cut a contrarian but non-trivial outcome given fragile coalition stability (30%).

Probability: 21%
Timeframe: 90 days
Deadline: Dec 1in 63d
Made: Sep 7

Regimewartime

Every NEXUS forecast is recorded before its outcome and scored with the Brier score (0 is perfect, 0.25 is a coin flip). Misses stay on the record. How forecasts are made and scored.

The United States will announce a new arms sale or defense equipment transfer to Taiwan within 30 days.

geopolitical27%

The US Treasury will announce an increase in short-term Treasury bill issuance as a front-loading measure within 30 days.

geopolitical25%

OPEC+ will convene an emergency, non-scheduled ministerial meeting within 30 days in direct response to Strait of Hormuz supply disruptions.

geopolitical46%

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Iran will announce a further uranium enrichment escalation (new centrifuge cascade activation or enrichment level increase) within 30 days.

geopolitical25%

Saudi Arabia will announce a coordinated OPEC+ production cut at the December 2026 ministerial meeting.

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