"Circumstances pertaining to Government" — Trump post locks in Iran closure odds
· flowframe Pulse
The Civil Aviation Authority of the Islamic Republic of Iran issued a sweeping Notice to Air Missions late Friday, sealing the western Tehran Flight Information Region through Monday morning. This development, identified as NOTAM OIIX A1010/26, is the primary driver behind the latest action on the Polymarket contract tracking whether Iran will close its airspace by May 31. It's the most explicit signal of a shutdown.
The market reacted with an aggressive push toward certainty. Prices for a "Yes" resolution rose by 3.0% today, ticking up from 96¢ to 99¢. This near-total consensus reflects a $5.0M total volume as traders bet that the current military posture won't let up before the May 31 deadline. At these levels, the tape is essentially saying the closure is already a done deal regardless of the rhetoric coming from regional mediators.
This move follows weeks of "empty skies" reports where commercial overflights thinned out to levels not seen since the February 28 strikes. While a ceasefire brokered in April provided a brief reprieve, the navigation "spoofing" in the Gulf and the Qatari delegation's sudden exit from Tehran on Friday signaled the truce's end. Earlier this month, odds sat near 47¢, but they've trended steadily upward as the strike window reopened and regional tensions began to boil over.
All eyes are now on Monday morning when the current flight restriction expires. If the Civil Aviation Authority extends the NOTAM or broadens it to the eastern corridor, the contract will hit its resolution trigger before the May 31 cut-off. Traders are simply waiting for the next bulletin.
--- The tape, as of 2026-05-23 00:58 UTC: Polymarket YES contracts on this market last printed at 99¢ — implied probability 99% — on $5.0M of cumulative volume. Move from prior reference: 96¢ to 99¢ (↑ 3.0%).
96¢ → 99¢ • Vol: $5.0M