The Iranian Parliament approved a proposal to close the Strait of Hormuz following a United States (US) attack on Iranian nuclear facilities on Saturday, June 21, 2025.
"Parliament has concluded that the Strait of Hormuz must be closed," said Major General Esmaeli Kowsari, a member of the Iranian Parliament's National Security Commission, as reported by Iran Press TV, citing Antara (June 23, 2025).
"The final decision on this matter will be determined by the Supreme National Security Council," he added.
The Strait of Hormuz is a shipping lane that passes through part of Iranian territory, which is currently at war with Israel and the US.
According to the U.S. Energy Information Administration (EIA), the Strait of Hormuz plays a crucial role in global oil trade.
"The strait is deep enough and wide enough to handle the world's largest crude oil tankers, and it is one of the world's most important oil chokepoints," the EIA stated in its report, Amid regional conflict, the Strait of Hormuz remains critical oil chokepoint (June 16, 2025).
"Large volumes of oil flow through the strait, and very few alternative options exist to move oil out of the strait if it is closed," they added.
According to EIA data, during the period 2020—Q1 2025, the volume of oil supplies shipped through the Strait of Hormuz ranged from 19 million to 21 million barrels per day (a combination of crude oil, oil products, and condensate).
This figure represents 19–21% of total global oil consumption.
"Flows through the Strait of Hormuz in 2024 and the first quarter of 2025 made up more than one-quarter of total global seaborne oil trade and about one-fifth of global oil and petroleum product consumption," said the EIA.
"The inability of oil to transit a major chokepoint, even temporarily, can create substantial supply delays and raise shipping costs, potentially increasing world energy prices," they stated.
The EIA revealed that the flow of oil exports through the Strait of Hormuz originates largely from major Middle Eastern oil-producing countries, such as Saudi Arabia, Kuwait, the United Arab Emirates, Iraq, and Iran.
Oil supplies through this strait are mostly shipped to Asia, particularly China, India, Japan, and South Korea.
"These markets would likely be most affected by supply disruptions at Hormuz," said the EIA.