Three-Line Briefing
- According to South Korean outlets including Yonhap News TV and yna.co.kr, international benchmark crude prices Brent and WTI have topped the $100-per-barrel mark again.
- Supply anxiety intensified as heightened Middle East tensions over the Strait of Hormuz, a Houthi attack on a Saudi oil tanker, and the UAE's withdrawal from OPEC all coincided.
- Domestic refiner stocks rallied in response, and the KOSPI was reported to have been affected by the rise in oil prices as well.
What the Number Really Says — $100 Is the Result, Not the Cause
The fact that Brent crude has hit $100 a barrel again is itself just the result. The real question is where the force pushing it to this level came from. Multiple outlets, including yna.co.kr, pointed to heightened Middle East tensions over the Strait of Hormuz as the backdrop for this rally, and Yonhap News TV explained Brent's renewed climb above $100 with the same tension narrative. Newsis reported that the United States has signaled a "counter-blockade" of the Strait of Hormuz.
What the market has already priced in under this setup is simply the fact that Middle East-originated supply risk persists. What hasn't been priced in yet is whether the Strait of Hormuz will actually be blockaded, and which direction U.S.-Iran negotiations will take. Newsis noted that the U.S.-Iran talks remain unclear, and Seoul Economic Daily reported that this distrust over negotiations has also weighed on Wall Street broadly. If the talks move toward a resolution, the current supply premium could unwind. Conversely, if the situation shifts toward a blockade scenario, the calculus for the refining industry and related sectors would tilt firmly toward cost burden.
Why Didn't the UAE's OPEC Exit Push Oil Prices Down?
The most unusual element in this episode is the UAE's withdrawal from OPEC. The fact that oil prices rose rather than fell at the moment a producer nation exited the cartel can be read as the market interpreting this departure not as a signal of an output-increase race, but as a crack in supply coordination. Electronic Times reported that WTI rose 2.8% despite the UAE's OPEC exit, while yna.co.kr put the same move at a 3% gain. Whether this cartel departure eventually spills into an output-increase race among producers, or remains a supply-uncertainty premium as it is now, will depend on the next OPEC-related decisions.
Numbers in Context — Why Do the Reported Gains Differ by Outlet?
The reported gains vary considerably by outlet. Electronic Times reported a 2.8% rise in WTI, yna.co.kr reported a 3% gain, and thecommoditiesnews.com reported that Brent surged 7% after the Houthi attack on the Saudi tanker. In terms of levels, v.daum.net reported Brent above $110 and WTI above $100, a higher level than other outlets' tallies that put the price just barely above $100.
It's more reasonable to read this discrepancy not as one outlet being wrong, but as a reflection of different measurement timing and comparison baselines across reports. Since the precise timing of the move itself hasn't been pinned down, it's safer to focus on the directional fact that prices topped $100 again rather than on any single percentage figure.
Stocks to Watch — Winners and Losers
- S-Oil, SK Innovation, GS: Newspim highlighted refiner stocks' strength as a notable move following crude's renewed climb above $100. Because their business model involves refining and selling crude oil, rising crude prices tend to boost the valuation gains on their inventory holdings.
- Korean Air: Jet fuel accounts for a large share of an airline's costs, so rising crude prices translate into a heavier fuel-cost burden. The airline industry is cited as a representative sector moving in the opposite direction from refiners.
- KOSPI: The Scoop reported that the renewed rise in crude prices hit the KOSPI. Given that the index includes many industry sectors with heavy cost exposure, rising oil prices can weigh on the index overall, regardless of how individual stocks (tickers) are affected.
Risk Check
- The precise timing of the event hasn't been confirmed, so the "when" reference point itself remains unclear.
- Reported gains range from 2.8% to 7% depending on the outlet, making it difficult to settle on a single figure.
- With U.S.-Iran negotiations still unclear, the current supply premium could either unwind or become entrenched depending on the outcome.
- Whether the Strait of Hormuz will actually be blockaded remains unconfirmed. Newsis's report of a "counter-blockade" warning or blockade intent is a scenario under discussion, not a confirmed fact.
Bottom Line
Brent and WTI's renewed break above $100 has served as a short-term positive catalyst for refiner stocks, but with U.S.-Iran negotiations and the Strait of Hormuz blockade question still unresolved, how long this premium lasts remains an open question. The prospect of oil reaching $120, raised by Newsis, likewise remains a speculative question rather than a confirmed forecast.
Frequently Asked Questions
Why did oil prices top $100 again?
The common explanation across multiple outlets is that supply-anxiety sentiment intensified as heightened Middle East tensions over the Strait of Hormuz, a Houthi attack on a Saudi oil tanker, and the UAE's OPEC exit all coincided. Outlets emphasize different factors as decisive, so it's reasonable to view multiple supply risks as having been priced in simultaneously.
Exactly how much did oil prices rise this time?
Electronic Times reported a 2.8% rise in WTI, yna.co.kr reported a 3% gain, and thecommoditiesnews.com reported that Brent surged 7%, with figures diverging by outlet. Rather than settling on a single number, it's safer to focus on the directional fact that prices topped $100 again.
What should investors watch next?
The next inflection points are whether U.S.-Iran negotiations progress and whether the Strait of Hormuz blockade scenario is actually carried out. If talks advance, the current supply premium could unwind; if the situation shifts toward a blockade, the nature of the impact on the refining industry and the KOSPI would change altogether.
Brent Crude IndicatorsAs of Sep 12, 2026
| Period Performance | 1W +9.52% 1M +17.57% |
|---|
Indices, commodities, and exchange rates are based on global markets, as of publication time.
S-Oil Key IndicatorsAs of Sep 12, 2026
| Period Return | 1W -4.64% 1M +6.01% |
|---|
Price and supply-demand (order flow) data are real-time figures from Korea Investment & Securities (KIS); supply-demand and news-tone aggregation are calculated by OneDayTrading itself.
Upcoming Events to Watch
- Sep 16FOMC Policy Rate DecisionHighFed monetary policy announcement — rate and dollar direction
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This article is automatically summarized and analyzed content based on original news reports. View original (Yonhap News TV)





