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Korean Refiners Gain as Global Capacity Shortage Persists

By Markets Desk · 2026-09-10 · 2 min read
A large industrial oil refinery complex with tall distillation towers and piping against a clear sky
Illustration: Tradingbird

S-Oil and SK Innovation posted double-digit gains this month. High interest rates are now acting as a barrier to new competition rather than a headwind for existing players.

SK Innovation shares rose 13.45 percent from the start of the month through September 9. S-Oil gained 9.36 percent over the same period. As of 9:10 a.m. on September 10, S-Oil traded at 164,300 won. SK Innovation was quoted at 158,500 won.

The rally stems from a global shortage of refining capacity. U.S. refinery operating rates hit a record high in August. Geopolitical risks in the Middle East have driven up crude oil prices. These factors have tightened supplies of refined products worldwide.

Capacity Shortage Drives Margin Expansion

Analysts at Korea Investment & Securities note that global supply remains tight. Russia is rationing exports, and demand in low-income countries is weak. It will take two to three years for refining capacity to normalize. This timeline suggests sustained pressure on refined product prices.

South Korea maintains a domestic ceiling on petroleum product prices. If geopolitical tensions ease, this cap could be lifted. Refiners would then capture profits in the domestic market. Currently, they are unable to realize these gains due to price controls.

Higher Rates Protect Incumbent Positions

Rising interest rates increase the cost of capital for new projects. This makes it harder for new competitors to enter the market. IBK Investment & Securities analysts state that high rates raise barriers to capacity expansion. Aging facilities are also retiring faster, benefiting existing players.

Investment flows favor refiners during rate-hike periods. Growth stocks with future earnings face higher discount rates. Refiners generate immediate cash flow from existing assets. Historical data from 2004 to 2006 and 2022 to 2023 shows refiners outperforming the broader market in these environments.

Low Inventories Amplify Price Volatility

Distributors hold lower inventories to reduce financing costs. This structural shift amplifies volatility in refining margins. A supply shock can cause refined product prices to rise faster than crude oil prices. Limited spare capacity ensures these elevated margins persist.

The value of refining assets depends on existing competitive capacity. Investment in new facilities is constrained by high borrowing costs. Domestic refiners with established infrastructure will see greater recognition of their asset value. This trend supports the long-term earnings outlook for the sector.

Based on reporting by GN auto markets/bonds: interest rates, compiled by the Tradingbird desk.

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