Higher oil prices and South Korea’s reliance on Middle Eastern crude have increased volatility in the won. USD/KRW has traded between 1,420 and 1,500 since December 2025.
Year-to-date, KRW is down 1.8% against the US dollar. The Bank of Korea has warned that intervention risks are rising as it views recent won moves as diverging from economic fundamentals.
The central bank is expected to keep interest rates unchanged for now. It is also expected to adopt a wait-and-see approach while focusing on foreign exchange stability.
Market support may include smoothing operations in both the onshore and offshore KRW markets. This could be backed by the central bank’s foreign exchange reserves.
With Brent crude futures trading above $115, the pressure on the Korean won is intensifying due to our high dependence on imported oil. Data from late 2025 confirmed that nearly 70% of our crude imports originated from the Middle East, explaining why the USD/KRW pair has been stuck in a volatile 1,420 to 1,500 range. This situation makes the won particularly vulnerable to global energy shocks.
The Bank of Korea is now signaling it has reached its limit with the won’s depreciation. Following the 1.8% drop against the dollar so far this year, the central bank’s recent hawkish warnings indicate a growing readiness to intervene directly in the currency markets. They see the won’s current level as disconnected from the nation’s solid economic fundamentals.
For derivative traders, this means the 1,500 level for USD/KRW is shaping up to be a strong ceiling. Selling call options or implementing bear call spreads with strike prices above this psychological barrier could be an effective strategy in the coming weeks. The BoK’s posture suggests that significant further upside for the pair will be met with resistance.
We should not doubt their ability to follow through, as the latest figures show foreign exchange reserves stand at a substantial $415 billion. We saw similar smoothing operations during the volatility of 2022 and 2023, providing a clear historical precedent for their interventionist playbook. This strong financial backing gives their verbal warnings real teeth.
While the central bank’s tone is hawkish, an actual interest rate hike seems unlikely for now. February’s headline inflation report, which showed an acceleration to 3.5%, justifies the tough talk, but the BoK appears to prefer using its reserves rather than monetary policy to combat this externally-driven price pressure. Therefore, the focus for traders should remain squarely on spotting signs of direct FX intervention.
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