Iran Reinstates Strait of Hormuz Restrictions Amid Market Uncertainty

By Patricia Miller

Apr 18, 2026

2 min read

Iran's renewed restrictions on the Strait of Hormuz create significant market implications as investors eye developments through May.

#How is Iran's Policy Impacting Market Expectations?

Iran has reintroduced restrictions on the Strait of Hormuz, citing alleged violations by the United States concerning a reopening agreement. Traders remain optimistic about a blockade lift by May 31, as reflected in the Polymarket contract, which holds steady at 85% for a YES outcome.

Despite Iran's recent actions, the market dynamics for May 31 indicate continued confidence among traders. Presently, the contract remains at 85% YES, suggesting investors expect a resolution to materialize by the specified deadline. Conversely, confidence diminishes for an immediate breakthrough in April, with the contract reflecting only a 17.5% YES rating. Additionally, the April 30 contract has experienced a slight decline, now sitting at 63% YES.

The combined daily trading volume across these contracts has reached $33,928 in USDC. Notably, the order book for the May 31 ticket requires $3,730 to adjust the price by five points, indicating significant liquidity and strategic positioning within the market as traders bet on a mid-term resolution.

#Why Should Investors Care About This Situation?

The return of restrictions by Iran underscores the volatility inherent in current negotiations. Market participants are still optimistic about lifting the blockade by May 31. However, confidence wanes regarding any immediate developments in April. Purchasing a YES position at 63¢ on the April 30 contract presents an opportunity for potential returns but hinges on an accelerated improvement in relations between the U.S. and Iran in the coming weeks.

#What Developments Should Investors Monitor?

For investors, the most reliable indicators will be official statements from the U.S. Navy and any shifts in military activity near the strait. Additionally, any diplomatic exchanges between Washington and Tehran or mediation efforts by third parties could significantly influence the market for both April and May contracts. Being aware of these developments can provide critical insights and potentially impact investment strategies in response to changing geopolitical climates.

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.