Regarding the US Navy Blockade of the Strait of Hormuz: Six Key Questions Market Focuses On

The US blockade of the Strait of Hormuz has pushed the global energy landscape to a new critical point. According to Xinhua News Agency, on April 12, Trump announced that the US Navy would immediately block all vessels entering or leaving the Strait of Hormuz. The US military officially executed this order on April 13. This move came just hours after peace negotiations between the US and Iran in Islamabad collapsed, directly threatening the fragile ceasefire agreement reached on April 7. The Islamic Revolutionary Guard Corps of Iran subsequently warned that any military vessel approaching the strait under any pretext would be considered a violation of the ceasefire. They also vowed to strike all ports in the Persian Gulf and the Sea of Oman if their own ports were threatened. Oil prices surged immediately as markets began pricing in further supply shortages. If effectively enforced, the blockade will not only cut off Iran's oil export lifeline but also exacerbate pressure on Asian countries heavily reliant on Middle Eastern energy. Below are the six core questions investors are most concerned about. I. What Exactly is the US Navy Doing? On April 12, permanent ceasefire negotiations between the US and Iran held in Islamabad collapsed. According to CCTV International News, hours later, Trump posted on social media stating that "effective immediately," the US Navy would block "all vessels attempting to enter or exit the Strait of Hormuz." He indicated that other countries would participate but did not name them. He also threatened to "intercept all vessels paying tolls to Iran in international waters," suggesting the scope of the blockade might extend far beyond the strait itself into the Sea of Oman. Compared to Trump's wording, the official US military statement was slightly narrower. The military set the start time for the blockade at 10:00 AM New York Time on April 13, applying it to all vessels "entering or exiting Iranian ports and coastal areas." Neutral vessels that have not docked in Iran will not be stopped but may undergo inspection for contraband cargo. The US military advised crew members navigating the Sea of Oman and approaching the Strait of Hormuz to closely monitor official announcements and proactively contact the US Navy. On April 13, the US military issued notices to ship operators stating that vessels departing from Iran would be intercepted, driven away, or detained. It remains unclear whether the US is willing to deploy its own warships deep into the Indian Ocean to chase tankers, and how both sides would respond in the event of a confrontation or damage to tankers. II. How Will Iran Respond? According to CCTV News, after the US threat to begin preventing any vessels from entering or exiting the Strait of Hormuz, the Islamic Revolutionary Guard Corps declared that any military vessel attempting to approach the strait under any pretext would be considered a violation of the ceasefire. Iran simultaneously warned that if its shipping hubs were threatened, it would launch strikes against all ports in the Persian Gulf and the Sea of Oman. John Bradford, a former US Navy officer and co-founder of the Yokosuka Asia-Pacific Research Committee, stated: "This new round of escalation is more likely to trigger further confrontation rather than promote reconciliation." III. Why is the US Taking This Action? Since the US and Israel launched attacks on Iran on February 28, Tehran has increasingly tightened control over the Strait of Hormuz, reducing the number of daily transiting vessels from approximately 135 during peacetime to single digits, nearly paralyzing this vital chokepoint. This asymmetric tactic has posed a dilemma for the US—while successfully blocking other nations' vessels from passing, Iran has maintained its own oil exports, thereby driving up global oil prices while preserving export revenue. The ultimate goal of the blockade is to cut off Iran's oil exports and sever the key financial source for its regime. The Trump administration previously implemented this strategy in Venezuela, using a blockade combined with sanctions to crush the country's economy. However, Venezuela is far smaller than Iran, with a limited fleet size and far less strategic significance for global oil exports. IV. What Does This Mean for Iran? If the blockade is effectively enforced, it will deal a heavy blow to Iran, which relies heavily on oil exports. Over the past few weeks, Iran has benefited from high oil prices—latest data shows Iran's March oil revenues surged by 37%. Previously discounted crude oil sold at a premium earlier this month, partly due to exemptions granted by the US to increase supply, allowing buyers to purchase previously sanctioned Iranian crude. For Iran, which is facing severe damage from US-Israel airstrikes and urgently needs to rebuild its economy, every dollar gained per barrel is crucial. Since the outbreak of war, these additional gains have accumulated to hundreds of millions of dollars. Once the blockade takes effect, this windfall could come to an abrupt end. V. What Does This Mean for the US? Trump frequently links Middle East supply shocks with US oil and gas export prospects, characterizing this crisis as a strategic opportunity for the US, a top-tier producer. According to CCTV International News, Trump claimed on Monday that numerous tankers are already heading to the US to load oil for shipment globally, "these ships don't even need to pass through the Strait of Hormuz." However, US crude is not a perfect substitute for Middle Eastern grades, and for American consumers, soaring benchmark oil prices are already driving up inflation. Iran clearly understands that regarding economic resilience, it may be stronger than the US. Oil prices surged immediately following the news of the blockade as investors prepared for potential supply shortages. VI. What Does This Mean for Asian Countries? Asia is the biggest victim of this energy crisis. Further restrictions on traffic through the Strait of Hormuz will worsen the situation for this region. Even before the blockade was announced, the number of transiting vessels had already significantly decreased. The exemption previously granted by the US for purchasing sanctioned Iranian crude appears to have been invalidated by the blockade order, drastically narrowing room for maneuver. Countries that had previously reached bilateral agreements with Iran may now fear direct confrontation with the US and be forced to shrink their procurement options. South Korean President Lee Jae-myung previously made remarks urging all Koreans to "save every drop of fuel" and proposed a $17 billion emergency relief plan to mitigate the impact of fuel price shocks on Korean households and businesses. Meanwhile, economies highly dependent on Gulf energy supplies, such as India and Australia, have also taken emergency measures. Jorge Montepeque, Managing Director of Onyx Capital Group, was direct in his comments to Bloomberg Television: "They are so focused on Iran that they fail to see what they are inflicting on the entire world. The pain is in Asia, the pain is in the South Pacific, the pain is in all oil-dependent nations."