The Strait of Hormuz, a mere 21 miles wide at its narrowest point, is a maritime chokepoint of immense strategic importance. It serves as the gateway for roughly a third of the world's seaborne oil exports, primarily from Gulf nations such as Saudi Arabia, Iran, the UAE, Kuwait, and Iraq.

This narrow waterway has long been a flashpoint for regional rivalries and global power struggles. Any disruption or closure, whether due to conflict, instability, or tactical manoeuvering, can send shockwaves through oil markets, drive up insurance costs, and trigger military responses.

In this context, the "Hormuz Gambit" has emerged as a potent tool of Iranian statecraft, taking on renewed significance in 2025 amid escalating tensions between Iran, Israel, and the US.

The Hormuz Gambit Explained
The crisis began when Iran's Parliament approved a proposal to close the Strait of Hormuz in response to US airstrikes on its nuclear sites in late June 2025. However, the final decision rests with the Supreme National Security Council, which has yet to authorise the move.

Controlling the northern side of the Strait, Iran is strategically positioned to disrupt the flow of around 20 million barrels of oil – roughly one-fifth of global consumption – that passes through this vital trade route daily. By targeting commercial vessels, Iran could significantly threaten global energy security.

Yet, a complete shutdown of the Strait would likely harm Iran's own oil exports to China and strain relations with GCC countries. Even verbal threats from Iran can unsettle global markets, underscoring the severity of potential consequences.

This calculated brinkmanship enables Iran to exert influence disproportionate to its economic weight, signalling strength and unpredictability to both adversaries and allies.

Oil as a Weapon and a Weakness
Oil is the lifeblood of Gulf economies, and its flow through the Strait of Hormuz is both a powerful instrument and a critical vulnerability. The economic health of states like Saudi Arabia, Iraq, and the UAE depends heavily on uninterrupted crude exports, most of which must pass through this strategic corridor.

Conversely, nations reliant on imported oil, including China, India, Japan, and many in Northwest Europe, are inextricably linked to the security of the Hormuz Strait. A slowdown in oil supply – or even natural gas – could have far-reaching consequences, including disruptions to fertiliser production, potential food shortages, and widespread unrest.

While Gulf states have developed alternatives, such as pipelines to Red Sea ports and new terminals in Oman, and pursued Eastern energy deals, these options can't fully replicate the volume or efficiency of tanker routes. This leaves the region economically strong yet strategically vulnerable.

The Hormuz dynamic extends far beyond Iran, entangled in a broader competition between Tehran and its Sunni Arab rivals, particularly Saudi Arabia and the UAE. These nations view Iran's influence in Yemen, Lebanon, and Iraq as destabilising, adding complexity to the regional landscape.

The Hormuz Gambit operates at the confluence of regional animosities, superpower rivalries, and the volatile calculus of deterrence, making it a multifaceted and high-stakes game.

Asia's Quiet Calculus
As Western powers grapple with the costs of Gulf interventions, Asian powers are recalibrating their roles. For energy-hungry Asian economies like China, India, Japan, South Korea, and Southeast Asian nations, the Strait of Hormuz is a lifeline for economic stability and industrial productivity.

A prolonged closure of the Strait would trigger strategic recalibrations across Asia. Recent reports of Iran loading naval mines onto vessels in the Persian Gulf have intensified concerns about a potential blockade. In response, India, China, and Japan have increased their naval presence in the Indian Ocean and Arabian Sea to protect sea lanes and assert maritime security interests.

This has led to a surge in diplomatic efforts to diversify energy sources, with these nations boosting ties with Russia, Central Asia, and African oil producers. They're also reviving interest in overland pipelines like TAPI and the Central Asia-China route to bypass the Strait.

However, the possibility of LNG disruptions from Qatar remains a concern, particularly for Pakistan and Bangladesh, which could face severe economic strain, including trade deficits, currency pressure, and slower growth.

China has secured maritime infrastructure and port access in Pakistan, Sri Lanka, and the Gulf of Oman through the Belt and Road Initiative. It's also increased naval deployments for anti-piracy operations near the Arabian Peninsula and is building logistical ties to support a sustained presence if needed.

India has ramped up its naval activity in the Indian Ocean, invested in Iran's Chabahar Port, and deepened ties with Gulf states through defence diplomacy and trade. With a 77-day oil stockpile, India is prepared for potential disruptions in the Strait.

The US has urged China to help dissuade Iran from closing the Strait, citing concerns about naval operations, Gulf bases, and broader conflict. Despite reduced reliance on Gulf oil, the US economy would still be impacted by global price spikes.

As long as the world remains heavily reliant on oil, particularly from the Gulf, the Strait will retain its outsized importance, and Iran will continue to wield it as both a shield and a sword.