[E-Daily Reporter Shin Ha-yeon ] As international oil prices surge amid renewed tensions surrounding the Strait of Hormuz—a key global crude oil shipping route—refining-related stocks are showing strength on the domestic stock market.

According to MP Doctor on the 14th, as of 9:12 a.m. that day, HeunguOil(024060)was trading at 13,720 won, up 1,080 won (17.87%) from the previous trading day. At the same time, KOREA PETROLEUM INDUSTRIES(004090)(6.96%), Joong Ang Enervis Co.,Ltd.(000440)(2.93%), and KukdongOil&Chem.(014530)(1.58%) were also on the rise.

This is believed to be due to international oil prices surging nearly 10% on the 13th (local time) after U.S. President Donald Trump announced the resumption of a naval blockade against Iran.

On that day, the closing price for September delivery futures on the ICE Futures Exchange was $83.30 per barrel, a sharp 9.6% increase from the previous trading day.

Brent crude rose to $83.54 per barrel during the session, reaching its highest level in about a month—since the 16th of last month, just before the signing of the Memorandum of Understanding (MOU) between the U.S. and Iran.

On the New York Mercantile Exchange, the closing price for West Texas Intermediate (WTI) crude oil for August delivery was $78.14 per barrel, up 9.4% from the previous trading day.

Amid renewed military clashes between the U.S. and Iran, President Trump announced today that he would resume a blockade on ships traveling to and from Iranian ports and coastal areas in the Strait of Hormuz.

He also declared that, in exchange for the U.S. military guaranteeing the safety of civilian vessels passing through the Strait of Hormuz, the United States would collect 20% of the cargo on board as a “security transit fee.”