On Monday, South Korean prosecutors filed charges against four major domestic oil refiners, accusing them of breaking fair trade laws by working together to increase fuel prices after the Middle East conflict.
Prosecutors claim that pricing managers at HD Hyundai Oilbank and SK Energy coordinated the timing and scale of price increases, while GS Caltex and S-Oil allegedly matched those moves. According to the prosecution, this was not an isolated event but rather an entrenched, systematic behavior that emerged amid a global crisis.
Including GS Caltex and S-Oil, the overall anticompetitive effect is estimated at about 26 trillion won.
Despite the charges, stock prices for the refiners and their parent firms rose. S-Oil climbed 6.08%. SK Innovation, which owns SK Energy, increased 1.58%, HD Hyundai rose 1.21%, and GS Holdings - which jointly runs GS Caltex with Chevron - gained 6.99%.
Get your free investing masterclass bonus when you join Market Briefs, our free daily newsletter
Prosecutors stated that the probe began after domestic fuel prices spiked in the wake of the U.S.-Iran conflict.
S-Oil declined to comment. HD Hyundai Oilbank, SK Energy, and GS Caltex did not respond to requests for comment.
Back in March, President Lee Jae Myung posted on social media that oil refiners and companies involved in price collusion would face consequences, promising to use every legal tool to combat unethical business practices.
The four refiners control roughly 80% of South Korea's refining capacity, giving them outsized influence over domestic fuel prices. Consumer advocacy groups have long criticized the sector for opaque pricing practices that often keep local prices above international benchmarks.
The case underscores the scrutiny faced by South Korea's refining sector, which supplies the vast majority of the nation's gasoline and diesel. Any coordinated price manipulation can directly impact consumer wallets and contribute to inflationary pressures. The government has previously warned about price gouging, and this indictment represents one of the largest antitrust actions against the industry in recent years. With the four companies controlling most of the country's refining capacity, the outcome of the case could set a precedent for future competition enforcement.
This indictment signals a turning point in South Korea's fight against corporate collusion in the energy sector, a market long dominated by a few players. Consumer groups have applauded the move as a necessary check on oligopolistic pricing power that has burdened households for years.
The case is part of broader efforts by authorities to crack down on collusion in essential industries. The four refiners control roughly 80% of South Korea's refining capacity, giving them outsized influence over domestic fuel prices. Consumer advocacy groups have long criticized the sector for opaque pricing practices that often keep local prices above international benchmarks. The indictment follows an investigation triggered by sharp price increases after the U.S.-Iran conflict.
Subscribe to Market Briefs, our free daily newsletter, and claim your bonus investing masterclass
