Strait of Hormuz traffic returns to normal by December 31?

Platform comparison

Market context

The Strait of Hormuz has been effectively closed to commercial shipping since late February 2026, following a reversal of a brief reopening by Iran amid escalating US-Iran tensions. While a ceasefire was signed in early April, traffic remains at a trickle, with only 25 vessels crossing on 18 June 2026 after a prior suspension, far below the historical average of roughly 120 passages. The market’s 89% implied probability of a return to normalcy by December 2026 assumes a rapid resolution to routing uncertainty and insurance cover, yet recent data shows war risk premiums have tripled and freight indices remain at record highs, suggesting structural delays persist despite diplomatic progress[1][2][8].

Traders should monitor the IMF Portwatch 7-day moving average for arrivals, as the market resolves only when this metric hits 60 or above. Key catalysts include the expiry of current war risk insurance, scheduled US-Iran diplomatic talks, and any announcements from major carriers like Mediterranean Shipping Company regarding rate hikes or route adjustments[1][3]. The divergence between platforms is stark: Polymarket offers decimal odds with minimal KYC and lower fees, while Kalshi requires full identity verification and higher transaction costs, and Betfair’s implied probability model may obscure the 11% downside risk more than Polymarket’s raw odds[1][4].

Historical parallels from the 2020–2021 Gulf disruptions show that even after ceasefires, shipping traffic can remain constrained for months due to lingering routing fears and insurance gaps. The current 89% probability may be overly optimistic given that commercial transits have not yet recovered to pre-crisis levels, and the Baltic Exchange index remains elevated at 423,736, indicating persistent port congestion and cost spikes[1][7]. The settlement window ending 31 December 2026 provides ample time, but the 60-arrival threshold is ambitious if the strait remains partially closed or if carriers continue to impose surcharges for Persian Gulf deliveries[2][5].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We read Strait of Hormuz traffic returns to normal by December 31? from four platform perspectives: Polymarket (on-chain CLOB), Kalshi (CFTC-regulated exchange), Betfair Exchange (sports book exchange), Smarkets (peer-to-peer betting exchange). Polymarket's live quote comes directly from the Polygon order book; the other three are listed with their platform attributes — fees, KYC, settlement currency, payment options — because a 1:1 contract comparison without API access would be guesswork.

Resolution & payout

Settlement is the biggest difference between the four platforms: Polymarket on-chain in USDC (instant), Kalshi USD via CFTC (T+1), Betfair and Smarkets in local currency via bank withdrawal (T+1 to T+3). PolyGram routes every trade directly into Polymarket's on-chain settlement, which is why payouts land fastest.

FAQ

Where can I trade this market with the lowest fees?

On PolyGram, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

PolyGram is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.

What's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

What does it cost to trade on PolyGram?

Zero. PolyGram routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.