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FX Options Traders Bet on Continued Strength for South Korean Won
Summary
The South Korean won has surged over 14% against the U.S. dollar since July, and activity in the foreign exchange options market suggests traders are positioning for the rally to extend through the end of the year.
Foreign exchange options traders are increasingly betting that the South Korean won, Asia's top-performing currency since July, will continue its upward trend. The won has strengthened more than 14% against the U.S. dollar since the start of July, and market positioning indicates expectations for further gains.
Options Market Signals Bullish Bets
Sentiment in the derivatives market is shifting decisively in favor of the won. The premium on one-month options that profit from a rising U.S. dollar against the won (USD/KRW) has narrowed for three consecutive days relative to options that benefit from a falling USD/KRW, signaling a growing belief in the won's strength.
"There is active demand for USD/KRW downside structures, mainly through put spreads or European knockouts, with tenors covering mostly to the year-end," said Saurabh Tandon, Global Head of FX Options at Standard Chartered Bank in Singapore. These strategies allow traders to position for a stronger won at a lower upfront cost than standard options.
This positioning was evident in recent trading activity. According to data from the Depository Trust & Clearing Corp. (DTCC), two of the largest USD/KRW trades on September 21 were put spreads. One such trade, expiring October 21, involved strike prices of 1,370 and 1,343, and would achieve its maximum value if the USD/KRW exchange rate is at or below 1,343 at expiration.
AdSpot Market and Economic Drivers
The bullish options activity coincides with a sharp move in the spot market. The USD/KRW exchange rate fell to approximately 1,350 on Wednesday, following a 1.3% drop in the previous session—its largest single-day decline in a month.
The won's rally is underpinned by strong fundamental factors. South Korean chipmakers are reportedly repatriating overseas funds to expand domestic production capacity. This, combined with booming global demand for semiconductors and artificial intelligence (AI) technology, is bolstering the country's economic outlook and attracting capital inflows, providing a solid foundation for the currency's appreciation.
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