The Strait of Hormuz has once again become the center of global attention after US President Donald Trump announced that the United States would restore a naval blockade targeting Iranian shipping, describe the US as the “Guardian of the Hormuz Strait,” and seek a 20% reimbursement on cargo transiting the waterway to cover security costs. Iran rejected US control over the strategic passage, while the announcement raised fresh concerns about maritime security, international law, and global energy markets.
Why the Strait of Hormuz Matters
The Strait of Hormuz is one of the world’s most important maritime chokepoints. A substantial share of globally traded crude oil and liquefied natural gas passes through this narrow waterway each day, making uninterrupted navigation critical for energy-importing countries in Asia, Europe, and beyond.
Because global energy markets depend heavily on the strait remaining open, any military escalation or uncertainty quickly affects oil prices, shipping insurance, freight costs, and investor confidence.
Potential Strategic Benefits for the United States
From Washington’s perspective, maintaining a strong naval presence in the Gulf serves several strategic objectives.
First, it reinforces freedom of navigation for commercial shipping, a long-standing US policy objective. Second, it reassures regional partners that rely on US security commitments. Third, greater maritime presence strengthens American influence over one of the world’s most strategically important trade routes.
If shipping remains secure, the US can argue that its naval operations contribute to global economic stability, although proposals such as charging transit fees would represent a significant departure from longstanding US positions on international waterways and raise legal and diplomatic questions.
Potential Strategic Benefits for Iran
Iran’s objectives are different.
Tehran has long viewed the Strait of Hormuz as a strategic asset that enhances its regional influence. Periods of heightened tension often increase the international focus on Iran’s security concerns and can strengthen its leverage during negotiations over sanctions, regional security, or its nuclear program.
Iran has consistently argued that its geographic position gives it an important role in Gulf security. Even when opposing US proposals, maintaining relevance in any future security arrangement can itself provide diplomatic leverage.
Competition Does Not Necessarily Mean Shared Interests
Although some observers speculate that both countries could gain influence from the strategic importance of Hormuz, this should not be confused with cooperation.
Washington and Tehran remain divided over sanctions, military deployments, regional alliances, and the legal framework governing navigation through the Strait. Their interests often overlap only in one respect: neither side benefits from a prolonged closure that severely disrupts global trade and risks broader regional conflict.
Beyond that limited overlap, their strategic goals remain fundamentally different.
The Biggest Winners May Not Be Either Government
If the Strait remains open and shipping continues despite tensions, the principal beneficiaries are likely to be the global economy rather than either government individually.
Stable maritime traffic supports:
- Global energy supplies.
- Lower transportation and insurance costs.
- Predictable international trade.
- Reduced inflationary pressure.
- Greater confidence in financial markets.
Conversely, prolonged disruption would affect oil exporters and importers alike, making sustained instability costly for many actors across the international system.
International Law Remains Central
The Strait of Hormuz is widely regarded as an international waterway subject to established rules governing transit passage.
Legal experts have noted that unilateral tolls or restrictions on international navigation would raise significant questions under international maritime law and could face diplomatic and legal challenges if implemented. Any long-term arrangement would likely require broad international acceptance rather than unilateral action.
The Future Will Be Shaped by Diplomacy
Whether the “Guardian of the Strait” concept develops into a lasting policy will depend on several factors:
- The trajectory of US-Iran relations.
- Reactions from Gulf states.
- The positions of major energy importers such as China, India, Japan, and the European Union.
- International legal and maritime institutions.
- The willingness of both sides to return to negotiations.
Even if military posturing continues, sustained diplomatic engagement will remain essential for reducing the risk of miscalculation in one of the world’s most strategically sensitive waterways.
Geopolitical competition
The debate over the “Guardian of the Strait” proposal highlights how the Strait of Hormuz has become far more than a shipping lane—it is a symbol of geopolitical competition, energy security, and international diplomacy. While both the United States and Iran may each seek strategic advantages from developments around the Strait, their objectives remain largely competing rather than shared. The broader global interest lies in ensuring that this vital maritime corridor remains open, secure, and governed by predictable international rules, because stability in Hormuz affects not only the Gulf region but also the wider global economy.
