Reopening of Hormuz

The series of processes and ripple effects through which maritime traffic returns to normal through international mediation and agreement after transit through the Strait of Hormuz is blockaded or eff

Reopening of Hormuz

Overview

The Reopening of Hormuz (호르무즈 재개방) refers to the series of processes by which maritime traffic returns to normal through international mediation and agreement among the parties after transit through the Strait of Hormuz (호르무즈 해협), which connects the Persian Gulf and the Gulf of Oman, is blockaded or effectively restricted. Because about 20% of the world's seaborne crude oil volume and a significant portion of liquefied natural gas (LNG) pass through this strait, whether it is reopened has immediate repercussions for international oil prices, shipping insurance premiums, and the energy security of various countries. Accordingly, the Reopening of Hormuz is treated not merely as the restoration of a shipping route but as a complex issue in which the Middle East security order and the global economy are intertwined.

Main Content

Strategic Background

The Strait of Hormuz is only about 33 km wide at its narrowest point, but the crude oil and gas exports of Saudi Arabia, Iraq, Kuwait, the United Arab Emirates, Qatar, and Iran all pass through it. If transit is blocked, there is effectively no alternative route, so the economies of oil-exporting countries and the energy supply and demand of importing countries are shaken at the same time. For this reason, Hormuz has long been called the 'throat of the world's energy supply.'

Development of the Blockade Phase

Blockade of the strait or threats to transit usually begin with military conflict, sanctions, or seizure incidents. When attacks on oil tankers, seizure of vessels, laying of sea mines, and navigation warnings due to military exercises overlap, shipping companies voluntarily deviate from the route, and war risk insurance premiums surge, creating a de facto suspension of transit. A characteristic of this issue is that even if a full blockade is not legally declared, a 'de facto closure' can occur.

Structure of Reopening Negotiations

Reopening usually proceeds simultaneously on three levels. First, hotlines and ceasefire agreements among the parties to ease military tension. Second, an international monitoring and escort system to ensure transit safety, including multinational naval escorts and sharing of navigation information. Third, economic compensation such as sanctions relief or adjustment of oil export quotas. With the United Nations, regional mediators, and major consumer countries participating, the agreement includes provisions guaranteeing freedom of transit, the return of seized vessels and crew, and verification of prevention of recurrence.

Implementation and Verification

Even after an agreement is announced, normalization does not occur immediately. It takes several weeks for the insurance market to lower the risk rating, and shipping companies return in stages, taking into account crew safety and cargo liability. In practice, the point at which transit volume recovers to 80–90% of the pre-blockade level is regarded as 'substantive reopening.'

Economic Ripple Effects

Reopening leads to lower oil prices, stabilized maritime freight rates, and normalization of insurance premiums. Conversely, if the blockade is prolonged, alternative supply sources (U.S. shale oil, Brazilian and Guyanese crude, West African crude) expand, followed by releases from strategic petroleum reserves and demand suppression, and in the long term it promotes diversification of energy import sources and expansion of domestic refining capacity. In other words, reopening restores the market, but it does not completely reverse the supply chain reorganization created during the blockade period.

Relevance to the South Korean Economy

South Korea depends on maritime transport for most of its crude oil and LNG imports, and a significant portion of that passes through Hormuz. Therefore, reopening directly affects the costs of the refining, petrochemical, power generation, and shipping sectors, and policy responses such as the use of strategic reserves and diversification of import sources are discussed alongside it.

Recent Trends

In 2024–2025, Houthi rebel attacks on commercial vessels in the Red Sea, Israel–Iran tensions, negotiations related to Iran's nuclear program, and buffer diplomacy following the normalization of Saudi Arabia–Iran relations overlapped, repeatedly highlighting Hormuz transit risks. Discussions in this period had three characteristics. First, the mainstream scenario became managing the risk not as a 'full blockade' but as 'partial and intermittent restrictions.' Second, a mixed safety system combining multinational escorts by the United States, Europe, and regional countries with voluntary evasive navigation by private shipping companies took hold. Third, as energy transition and renewable energy expansion progressed, awareness spread that vulnerability to short-term supply shocks remains significant. In addition, an early warning system that uses insurance and shipping data to track transit volume and risk ratings in real time is becoming a key tool for verifying reopening.