As of September 3, 2026, Polymarket prices “Bab el-Mandeb Strait effectively closed by October 31?” at 6% YES with $1.2M traded. 3 tracked wallets hold a position here, 1 of them tier-1; the dominant side is NO.
Prediction markets put the probability at 9%: Bab el-Mandeb Strait effectively closed by October 31. Currently, markets see this as unlikely (9% YES). They said the decision was in response to what they called "an unjust and oppressive siege" imposed on Yemen by the Saudis.
The question of whether the Bab el-Mandeb strait effectively closed by October 31 hinges on an escalating naval confrontation off Yemen's coast. On July 20, 2026, Yemen's Houthis declared a naval blockade against Saudi Arabia, citing what they called an "unjust and oppressive siege" imposed on Yemen. A full closure of the strait — the southern gateway to the Red Sea — would halt Saudi oil exports to Asia and could reduce global oil supply by roughly 7%. The Saudi-led coalition vowed to respond "with firmness," characterizing the threats as "a blatant violation of international law" amounting to acts of maritime piracy. [Reuters, Jul 20]
By late July, messaging had grown mixed. The Houthis confirmed their military blockade "remains in effect" and struck two Saudi-flagged commercial tankers in the Red Sea, yet top Houthi negotiator Mohammed Abdusalam pushed back on characterizations of a total shutdown, writing on X that "there is no closure of Bab el-Mandab as some are suggesting." That distinction matters: whether the Bab el-Mandeb strait effectively closed by October 31 depends less on rhetoric than on measurable disruption to transit volumes, insurance rates, and vessel diversions around the Cape of Good Hope. The pause coincided with a broader de-escalation, as the U.S. halted Iran strikes for a second straight night amid talks described as moving positively. [CBS News, Jul 27]
Violence resumed in August. On August 11, Yemen's internationally recognized government accused the Houthis of killing six people — including two security personnel on a rescue mission — in missile strikes on a commercial vessel in the strait, which divides the Arabian Peninsula from the Horn of Africa. The conflict has widened as the US-Iran war ripples across the region, with Iranian-backed Houthi forces fighting in Yemen while tensions persist around the Strait of Hormuz. What comes next depends on whether targeted attacks harden into a sustained, traffic-halting blockade before the deadline. [Al Jazeera, Aug 12]
See which tracked wallets hold this market (entries, size, P&L), the models’ fair value and entry targets — and get an alert within a minute when they trade.
Unlock PRO — $29/mo7/8 models agree on NO, fair value 9c vs market 6c. 1 tier-1 wallet aligned with models — BUY NO at 6c.
| Model | Says | Fair Value estimated fair price | Confidence |
|---|---|---|---|
| MATH Bayesian Update | NO | 97c | — |
| MATH PIN Model | NO | 97c | — |
| MATH Compound Signal | NO | 75c | — |
| AI DeepSeek Quant | NO | 95c | 78% |
| AI Grok Contrarian | NO | 82c | 55% |
| AI Gemini Flash | NO | 96c | 90% |
| AI Kimi Macro | NO | 92c | 72% |
| AI Claude Analysis | ??? | — | 0% |
7 of 8 models estimate NO fair value below market (75–97c vs 94c). Gemini Flash leads with 90% confidence.
Models estimate fair value of NO at 91c — market prices it at 94c. 3-point gap supports YES.
Tracked wallets show dominant NO positioning, with entries at 88c-95c signaling confidence that the Bab el-Mandeb Strait will not be effectively closed by October 31. The absence of profitable YES entries and the 12c YES entry suggest early bullish bets have been abandoned or are being held at a loss, reinforcing the bearish (NO) consensus.
| Wallet | Category | Side | Amount | P&L | |
|---|---|---|---|---|---|
| 0x12d6..a8 | Retail | NO | $9.8K | +8% | |
| 0x5cd5..33 ★ | Retail | NO | $4.0K | 0% | |
| 0x551e..e0 | MM | YES | $1.9K | -57% |
With YES at 6c, all YES entries from 12c are deeply underwater, while half of NO positions entered at 88c-95c remain profitable as the market prices near-certain non-closure. The 6c YES price reflects strong NO-side support, with sellers willing to cap upside at 94c-95c and no bid pressure to lift YES above single digits.
Polymarket prices YES at 6c with $1.2M in total volume. Our model estimates fair value at 9c. 3-point gap is within normal range — no significant mispricing.
| Platform | YES Price | Volume |
|---|---|---|
| Polymarket | 6c | $1.2M |
| Our Model | 9c | — |