Bab el-Mandeb Strait effectively closed by 2026?

Platform comparison

Market context

Iran has threatened to close the Bab el-Mandeb Strait, a critical chokepoint for Red Sea trade, though it has not yet directly blocked passage as the route remains under Houthi influence. Current traffic dips reflect carriers rerouting for safety rather than a formal shutdown, with oil transit through the strait largely unchanged despite security fears [4]. The crowd-implied 0% probability aligns with this distinction: while the Strait of Hormuz faced a quasi-blockade in March 2026 with vessels dropping to 1–7 per day, Bab el-Mandeb has not seen a comparable collapse in transit calls [2].

Traders should monitor Iran’s Supreme Leader Mojtab Khami’s warnings that allies could restrict access similarly to Hormuz, alongside any escalation following the US-Israel attack on Iran in late February [1]. The key catalyst is whether daily transit volumes recover to 60+ vessels for two consecutive weeks, as this would signal managed reopening rather than effective closure [5]. Watch for updates on war-risk insurance rates falling below 1% and whether mainline carriers resume normal booking schedules, as these dependencies directly impact the IMF PortWatch 7-day moving average that settles this market.

The funding flows driving book depth here hinge on payment friction: traders depositing via Klarna or SEPA face on-ramp delays if volatility spikes, while USDC withdrawals may stall if rail congestion mirrors the port anchorage ratios seen in South Asian hubs [2]. As container shortages and emergency fuel surcharges rise, the market’s traction reflects not just geopolitical risk but the liquidity constraints of users navigating these deposit and withdrawal rails.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page compares Bab el-Mandeb Strait effectively closed by 2026? with a focus on payment rails and deposit friction. Polymarket accepts USDC on Polygon only; Kalshi only ACH/Plaid (US only); Betfair card/SEPA in EU/UK; Manifold no deposit. Polymarket Klarna UK additionally offers Klarna and SOFORT as fiat on-ramps to USDC. Live odds reflect the Polymarket order book.

Resolution & payout

Settlement path determines payout latency. Polymarket settles on-chain (USDC, minutes). Broker frontends like Polymarket Klarna UK add Klarna/SOFORT as fiat withdrawal options with T+1 processing. Kalshi: USD via ACH (T+1 to T+3). Betfair: local currency via card/SEPA (T+1 to T+5).

FAQ

How does Klarna deposit work on Polymarket Klarna UK?

You enter the deposit amount in EUR/GBP, choose Klarna as the method, run through Klarna's standard authentication (Pay Later or Direct Bank Transfer), and Polymarket Klarna UK converts internally to USDC for the Polymarket order book. Processing: typically under 30 minutes.

What does SOFORT cost as a deposit method?

Polymarket Klarna UK charges no fees for SOFORT. The only cost is the internal FX spread (typically <1%) on EUR→USDC conversion. SOFORT itself has no end-user fees — the platform absorbs acquirer costs.

Which payment methods are supported?

Klarna (Pay Now / Pay Later), SOFORT, SEPA bank transfer, credit card (Visa/Mastercard), Apple Pay, Google Pay, and direct USDC deposit on Polygon. Availability depends on your jurisdiction.

Can I deposit with a credit card?

Yes, Visa and Mastercard. Credit card deposits carry a ~2.5% acquirer surcharge (standard for card payments). Apple Pay and Google Pay run on the same card rails — same surcharge.

How do withdrawals work?

Identical methods in reverse. SEPA withdrawal: T+1 (standard) or under 10 seconds (SEPA Instant). Klarna withdrawals process via bank-account refund. USDC withdrawal to external wallet: Polygon gas cost (typically $0.01).