What's happened
As of mid-March 2026, Iran exerts selective control over the Strait of Hormuz, a vital maritime chokepoint through which 20% of global oil passes daily. Since the US-Israel strikes on February 28, multiple attacks on vessels have disrupted traffic, causing tanker flows to collapse by over 90%. Iran allows limited passage to allies via negotiated safe corridors, while many ships transit with tracking systems off. The US has deployed Marines and threatens military action if Iran mines the strait.
What's behind the headline?
Strategic Leverage Through Selective Passage
Iran's shift from an open international waterway to a system of "selective passage" through the Strait of Hormuz represents a calculated strategy to exert maximum pressure on global energy markets without triggering a full blockade. By allowing only certain vessels—primarily those from allied or neutral countries—to transit via negotiated safe corridors, Iran maintains leverage while avoiding the severe international backlash a total closure would provoke.
Impact on Global Energy and Shipping
The collapse of tanker traffic by over 90% in March and the accumulation of roughly 1,100 ships waiting in Gulf waters highlight the severe disruption to global oil supply chains. Gulf producers are rerouting exports through pipelines bypassing the strait, but these alternatives cannot fully compensate for the lost maritime capacity, contributing to elevated and volatile oil prices.
Covert Operations and Risk Management
The widespread use of "dark transit" tactics—ships switching off AIS tracking systems—reflects efforts by shipping companies to evade targeting and sanctions. This shadow fleet activity underscores the high-risk environment and the lengths operators will go to maintain oil flows.
Military and Diplomatic Dimensions
The US deployment of Marines and threats of military action if Iran mines the strait signal Washington's intent to deter further escalation. However, Iran's resilience and control over the strait complicate efforts to restore free navigation. Diplomatic negotiations with countries like India and Turkey to secure passage for their vessels indicate Iran's willingness to use the strait as a bargaining chip.
Forecast
The strait will remain a focal point of geopolitical tension, with Iran leveraging its control to influence global energy markets and international diplomacy. Unless a diplomatic breakthrough occurs, disruptions and elevated oil prices will persist, with the risk of further military escalation looming if Iran intensifies attacks or imposes a full blockade.
What the papers say
The New Arab reports that Iran has implemented a "selective passage" system, effectively deciding which vessels may transit the Strait of Hormuz, with tanker traffic collapsing by over 90% in March and about 1,100 ships waiting in Gulf waters. The New Arab cites Iranian Foreign Minister Abbas Araghchi stating the strait is "open" but "closed only to our enemies," highlighting Iran's strategic control.
The Independent provides detailed tracking of vessels like the Pakistan-flagged Karachi (Lorax), which transited with AIS signals on, suggesting Iran's direct guidance and selective permission. Freight analyst Matthew Wright notes that Iran is managing oil flows to friendly Asian partners, but warns this selective approach cannot be broadly expanded without undermining Iran's leverage on oil prices.
The New York Times outlines the US military response, including deploying Marines and considering naval escorts for merchant ships, while noting Iran's resilience to aerial bombardment and artillery strikes. It also discusses the historical context of mine warfare in the strait and current US efforts to clear mines.
Reuters and The Independent report on Iran's deployment of mines and attacks on vessels, with the UK Maritime Trade Operations confirming multiple attacks since the conflict began. President Trump has warned Iran against mining the strait, threatening unprecedented military consequences.
Together, these sources illustrate a complex picture of Iran's strategic use of the Strait of Hormuz as a bargaining tool amid ongoing conflict, with significant implications for global energy security and geopolitical stability.
How we got here
The conflict escalated after US and Israeli strikes on Iran on February 28, 2026, including the assassination of Iran's supreme leader. Iran's Revolutionary Guard Corps declared full control over the Strait of Hormuz, threatening to block shipping. The strait is a critical route for global oil and liquefied natural gas exports, making its closure a major threat to energy markets and global trade.
Go deeper
- How is Iran controlling shipping through the Strait of Hormuz?
- What impact does the disruption in the Strait of Hormuz have on global oil prices?
- What is the US military's response to the situation in the Strait of Hormuz?
Common question
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What Does Iran Controlling the Strait of Hormuz Mean for Global Oil Supply?
Iran's recent assertion of full control over the Strait of Hormuz has significant implications for global energy markets. As this vital waterway connects the Persian Gulf to the Gulf of Oman, any disruption can impact worldwide oil supplies and prices. Many are asking: what does this mean for global oil security, and how are world powers responding? Below, we explore the key questions surrounding this tense situation.
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How Are Geopolitical Crises Impacting Financial Markets and Investment Trends?
Recent geopolitical events, from Iran's control of the Strait of Hormuz to regional tensions following the assassination of Iran's Supreme Leader, are shaping global markets in profound ways. Investors and industry leaders are asking how these crises influence investment strategies, market stability, and future opportunities. Below, we explore key questions about these developments and what they mean for your investments in 2026.
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What’s happening in the Strait of Hormuz and Middle East tensions?
Recent developments in the Strait of Hormuz and the broader Middle East have raised serious concerns about regional stability and global energy security. Iran's control over this vital waterway, along with escalating conflicts between Iran and Israel, are prompting questions about the safety of oil shipping routes and international responses. Below, we explore the key events, their implications, and what they mean for the world today.
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Why Did Iran Close the Strait of Hormuz?
The closure of the Strait of Hormuz by Iran marks a significant escalation in regional tensions and has major implications for global oil markets. Understanding why Iran took this step, how it affects worldwide oil supply, and what risks are involved can help you grasp the broader picture of this ongoing conflict. Below, we explore the key questions surrounding this critical event.
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Why Did Iran Claim Control Over the Strait of Hormuz?
Recent tensions in the Middle East have led Iran to assert control over the strategic Strait of Hormuz, a vital route for global oil shipments. This move has raised concerns about potential disruptions to worldwide oil supplies and increased regional instability. Many are asking: what prompted Iran's claim, and what could it mean for global markets? Below, we explore the key questions surrounding this developing situation.
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Why Are US Marines Being Deployed to the Strait of Hormuz?
The recent deployment of US Marines to the Strait of Hormuz has raised many questions about regional security and global oil supplies. With Iran threatening to block this vital waterway, many are wondering what the US aims to achieve and what the potential consequences could be. Below, we explore the key questions surrounding this tense situation and what it means for the world.
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Why Did the US Deploy Marines to the Strait of Hormuz?
The US has recently deployed Marines to the strategic Strait of Hormuz amid escalating tensions with Iran. This move raises questions about the reasons behind such a deployment, the risks involved, and what it means for global energy security. Below, we explore the key questions surrounding this military action and its broader implications.
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What’s Happening in the US-Iran Conflict and Why It Matters
The escalating tensions between the US and Iran have captured global attention, especially with recent military deployments and threats over the Strait of Hormuz. Many are asking: what exactly is happening, and what could this mean for the world? Below, we answer some of the most common questions about this crisis, helping you understand the key issues and potential outcomes.
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What Does a Military Escalation in the Middle East Mean for the World?
The recent escalation in the Middle East, including US military deployments and Iran's threats to block the Strait of Hormuz, has global implications. This page explores what these developments mean for international stability, energy markets, and everyday life. Curious about how this could affect global security, oil prices, or regional stability? Keep reading for clear answers to your most pressing questions.
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What Are the Possible Outcomes of the US-Iran Tensions in the Middle East?
The escalating conflict between the US and Iran over the Strait of Hormuz has significant implications for global stability. With military deployments, threats to block vital oil routes, and international responses, many are wondering what could happen next. Will this lead to a broader regional conflict, new alliances, or economic upheaval? Below, we explore the key questions and potential scenarios shaping the future of Middle East tensions and their global impact.
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Why Is Iran Controlling the Strait of Hormuz?
Iran's strategic control over the Strait of Hormuz has significant implications for global oil markets and international security. Since mid-March 2026, Iran has exercised selective passage through this vital maritime chokepoint, affecting over 20% of the world's oil exports. This raises questions about Iran's motives, the risks of conflict, and how global trade is impacted. Below, we explore the key questions surrounding this tense situation.
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How Are Middle East Tensions Affecting Global Markets?
The ongoing conflict in the Middle East, especially with Iran controlling the Strait of Hormuz, is having a significant impact on global markets. From soaring oil prices to disruptions in energy supplies, many are wondering how these tensions will shape the economy in the coming months. Below, we explore key questions about the current situation and its wider implications.
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