Iran's Shipping Policy in the Strait of Hormuz: What Investors Need to Know

By Patricia Miller

Apr 19, 2026

2 min read

Iran's new shipping policy raises questions on security costs in the Strait of Hormuz, impacting market dynamics and ship transit likelihood.

Iran has announced a new policy prioritizing ships that pay for security costs in the Strait of Hormuz. Recently, the Polymarket contract indicating a likelihood of fewer than 10 vessels transiting from April 13 to 19 shows very low odds at just 0.4%. This statistic highlights considerable skepticism about Iran's effectiveness in enforcing such stringent measures.

The market's reaction is telling. With a daily trading volume of only $14 in real USDC transactions, the contract displays extremely thin liquidity. Such low trading activity means even modest trades can significantly influence the odds; for instance, a mere $12 trade can shift the odds by 5 points. This market is particularly sensitive because just one trader can move the entire market.

Why should investors care about this situation? Iran presents its fee structure as a security measure, while the United States and its allies contest that this is illegal. Daily transit through the strait has plummeted from approximately 138 ships to a mere 5 to 8, indicating a significant disruption in maritime traffic. The market currently evaluates the probability of transits dropping below 10 ships by the specified date as almost negligible. However, the thin liquidity means this pricing may lack substantial informational value.

A YES share currently trades at 0.4 cents, offering a potential payout of $1 if fewer than 10 ships carry out transit, essentially promising a return of 250 times the initial investment. Buying this share becomes an investment in the expectation of strict enforcement from Iran without any significant diplomatic breakthroughs in the next day.

Should there be official commentary from CENTCOM or the Iranian government, or if there is a shift in military dynamics or diplomatic negotiations, the odds can shift dramatically due to the current volume of trading.

Important Notice And Disclaimer

This article does not provide any financial advice and is not a recommendation to deal in any securities or product. Investments may fall in value and an investor may lose some or all of their investment. Past performance is not an indicator of future performance.