Strait of Hormuz Ship Transit Count: Week of July 20

The Strait of Hormuz is moving roughly forty-six cents on the dollar toward a traffic count of fifty to seventy-four ships for the week of July 20. That is not a calm market. A forty-six percent implied probability on what should be a routine shipping corridor reflects genuine uncertainty about whether Iranian pressure, US naval posture, or regional escalation is squeezing traffic below historical norms.

The market asks how many ships transit the Strait of Hormuz during the week of July 20, 2026. The fifty-to-seventy-four outcome trades at $0.46 (46% probability), while all other outcomes combined sit at $0.55. The market resolves July 26, 2026. Total volume stands at $64,773, with $24,535 traded in the last twenty-four hours.

How the Hormuz Transit Contract Works

This contract resolves based on verified ship transit counts through the Strait of Hormuz for the seven-day window beginning July 20, 2026. Polymarket determines the outcome using publicly available maritime tracking data. Each outcome bracket represents a range of weekly vessel crossings.

• 50-74 ships transit: priced at $0.46, implying 46% probability.
• 75-99 ships transit: the next most plausible bracket, drawing meaningful trader interest.
• 100-124 ships transit: historically closer to normal weekly traffic levels.
• 125+ ships transit: implies a surge above recent averages.
• Fewer than 50 ships transit: implies a near-closure event, the most extreme outcome.

The contract pays out at $1.00 only if the final verified count lands in the fifty-to-seventy-four range. A count of seventy-five or above, or forty-nine or below, means the $0.46 position pays nothing. The critical question is whether Iranian activity, US naval interdiction, or commercial risk perception has pushed weekly crossings into this suppressed band.

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Market Signals Point to Accelerating Conviction

Momentum here is unusually strong. The one-hour change of plus 0.5%, the twenty-four-hour change of plus 6.0%, and a trend score of 19.48 all point in the same direction: traders are actively buying the fifty-to-seventy-four outcome. A trend score above 15 is notable for a maritime logistics contract. The most identifiable catalyst is the broader Iran-US tension pattern visible in related markets, particularly the fifty-nine percent probability that Iran closes its airspace fully and the thirty-one percent probability on a US-Iran nuclear deal.

Total volume of $64,773 is thin by geopolitical market standards. The $24,535 traded in the past twenty-four hours represents nearly forty percent of total lifetime volume, signaling a sharp acceleration. Liquidity of $80,589 exceeds total volume, which means the order book is deeper than historical trading activity. That is worth watching: it suggests market makers have positioned themselves but retail conviction has been limited until this recent surge.

• The fifty-to-seventy-four outcome has gained six percent in twenty-four hours, connected directly to escalation signals in Iran-related markets.
• The one-hour change of plus 0.5% shows the buying pressure has not yet exhausted itself as of July 23, 2026.
• Thin total volume below $100,000 means a single large trade can move this market materially before July 26.
• The strong positive correlation with the China-Taiwan military clash market (7%) and the Xi Jinping departure market (5%) suggests traders are pricing a broader regional risk-off environment affecting global chokepoints.
• The Iran airspace closure market at fifty-nine percent is the strongest related signal: if Iran restricts commercial overflights, the same pressure that closes sky lanes tends to discourage sea transit.

Lines Analysis: What the Strait of Hormuz Data Actually Says

The case for the fifty-to-seventy-four outcome is built on regional pressure, not statistical noise. The Strait of Hormuz normally handles somewhere between fifteen and twenty-one million barrels of oil per day in tanker traffic, with weekly vessel counts historically running well above seventy-five ships under normal commercial conditions. For the market to price a forty-six percent chance of a sub-seventy-five count, traders are pricing a meaningful disruption. The Iran airspace closure market at fifty-nine percent provides the clearest corroborating signal: Iranian authorities moving to restrict overflights typically accompanies heightened naval assertiveness in the strait itself.

The alternative scenario matters. If Iranian naval activity remains at baseline levels and no US interdiction event occurs, weekly transits are likely to land in the seventy-five-to-ninety-nine or one-hundred-to-one-hundred-twenty-four range. Commercial shipping operators do not reroute around the Cape of Good Hope without a concrete trigger. The absence of a confirmed Iranian ship seizure or US Navy confrontation in the week of July 20 would push the count above seventy-four and make the current favorite outcome a losing trade.

• Iranian Revolutionary Guard Corps naval activity in the strait is the primary variable: any confirmed vessel seizure or harassment incident before July 26 would push the fifty-to-seventy-four outcome higher.
• US Fifth Fleet posture out of Bahrain is a countervailing signal: increased escort operations historically maintain commercial transit counts rather than suppress them.
• The US-Iran nuclear deal market at thirty-one percent suggests a non-trivial probability of diplomatic de-escalation, which would push transit counts back toward historical norms and hurt the current favorite.
• Tanker insurance premium data from London markets would be a leading indicator: rising war-risk premiums precede transit count declines by forty-eight to seventy-two hours.
• Any announcement by major oil exporters, particularly Saudi Arabia or the UAE, about rerouting shipments would shift the count bracket dramatically before resolution.

Here is what the market is missing. The math does not lie on thin-volume contracts: a $24,535 single-day surge on a $64,773 lifetime volume market means someone with specific intelligence about maritime activity this week is buying aggressively. Whether that intelligence reflects confirmed Iranian naval maneuvers or just regional anxiety about the Iran airspace closure market is not determinable from price alone. The $80,589 in liquidity sitting in the order book will absorb more buying before the July 26 resolution date, but the window is closing fast.

LINES VERDICT

Elevated Disruption Probability

The market is pricing a real but not certain suppression of Hormuz traffic, driven by regional escalation signals across multiple correlated contracts. The buying acceleration on July 23 reflects informed conviction, not noise.

What the market says: A 45.5% implied probability means traders see the fifty-to-seventy-four ship count as the single most likely outcome, but not the majority view. With resolution arriving July 26, 2026, any confirmed maritime incident or de-escalation signal in the next seventy-two hours will move this price sharply.