Investor Insights on Iran's Strait of Hormuz Control and Market Reactions

By Patricia Miller

Apr 18, 2026

2 min read

Iran asserts control over the Strait of Hormuz, signaling increased market risks amid potential U.S. blockade developments.

Iran's Parliament Speaker announced the nation's authority over the strategic Strait of Hormuz, issuing a warning to restrict passage if the ongoing U.S. blockade persists. Currently, the market probability for U.S. President Trump announcing an end to the blockade by May 31 stands at 82%. However, this figure has seen a decline from 90% just a day prior, indicating growing skepticism among investors.

The trading market concerning the blockade announcement has sharply declined, evidenced by the significant drop in the April 19 sub-market probability, which plunged from 28% to 8% in just one session. This drastic 20-point fall reflects traders' adjusted expectations regarding the potential for an immediate resolution to the ongoing tensions.

In the UK, the probability of warships navigating through the Strait of Hormuz has also declined, reaching 8.5%, down from 12% yesterday. With only 12 days left for possible UK military action, the escalating risks of confrontation reduce the likelihood of safe transit.

The traffic of ships scheduled to transit from April 13 to 19 remains nearly negligible, paralleling the existing low traffic levels under the blockade and Iran's assertive claims of control.

Recent trading volume across these markets has reached $29,602 within the last 24 hours. A relatively small order of $1,419 has the potential to sway the May 31 market by five points. Furthermore, a minimal investment of $304 could influence the UK warship market due to its thin trading volume.

The statements made by the Parliament Speaker indicate a marked escalation, making an immediate resolution appear increasingly unlikely. Currently, at 22 cents, a YES share for the blockade being lifted by April 19 could yield a return of 4.5 times the investment; however, such a return hinges on a significant diplomatic breakthrough occurring within the next 24 hours.

Investors should remain vigilant for any shifts in President Trump’s public pronouncements or communication from the Iranian Foreign Ministry, as any unexpected diplomatic developments could lead to rapid price adjustments in these contracts.

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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.