The USD-KRW exchange rate plunged to the 1,510 won range on the 8th following coordinated intervention signals between Korean and Japanese forex authorities and suspected smoothing operations by Korean authorities. As of 6:00 AM on the 8th, USD-KRW traded at 1,515.80 won, down 14.50 won from the previous trading day's close of 1,530.30 won, briefly touching 1,510.60 won intraday — the lowest level since the intraday low of 1,509.10 won on June 17. The sharp decline occurred after Japanese Vice Finance Minister Atsushi Mimura emphasized close communication with Korean authorities regarding recent forex market trends, and Korean Deputy Finance Minister Moon Ji-seong confirmed frequent bilateral contact, dampening the market's previously dominant long sentiment that had anticipated further USD-KRW appreciation amid the yen's historic weakness and 13 consecutive days of foreign selling in the Korean stock market.
USD-KRW Exchange Rate Drops to 1,510 Won Range on the 8th
In the Seoul foreign exchange market on the 8th, USD-KRW opened at 1,515.80 won as of 6:00 AM, down 14.50 won from the previous trading day's (the 6th) Seoul market close of 1,530.30 won. During the session, the exchange rate fell as low as 1,510.60 won, threatening to break below the 1,510 won level. This marked the lowest intraday level since the low of 1,509.10 won recorded on June 17.
Prior market sentiment had been overwhelmingly bullish on USD-KRW appreciation. The USD-JPY exchange rate had surged to the 162 yen range, pushing the yen to historic weakness levels, while foreign investors sold Korean stocks for 13 consecutive trading days, sustaining dollar buying demand. A securities firm official stated, "When meeting with stock and bond market participants recently, the prevailing mood was generally open to the possibility of USD-KRW appreciation. As the high exchange rate persisted, some who had anticipated rate increases were pleased, saying 'their judgment was correct.'"
Korean and Japanese Authorities Signal Coordination on Forex Intervention
The market atmosphere shifted markedly after Japanese Vice Finance Minister Atsushi Mimura emphasized during London trading hours on the previous day that authorities are "in close communication" with Korean forex authorities regarding recent foreign exchange market trends. Korean Deputy Finance Minister for International Economic Affairs Moon Ji-seong also stressed that "the two countries are communicating closely and in frequent contact."
Following the Korea-Japan coordination signals, market long sentiment subsided. Dollar selling volume suspected to be smoothing operations by authorities emerged during low-liquidity trading hours, causing USD-KRW to plunge nearly 20 won.
Options Market Indicators Reflect Weakened Short-Term Upside Expectations
Short-term upside caution for USD-KRQ in the currency options market rapidly diminished. According to Yonhap Infomax FXO Daily by Currency (screen number 2294), the 25% delta risk reversal (RR25) for 1-month USD-KRW options declined from 0.77 on the 1st of this month to 0.38 on the previous day and 0.18 on the 8th. The 1-week RR25 also dropped significantly from 0.62 to 0.27 and 0.07 over the same period.
RR25 serves as an indicator gauging market sentiment and potential directionality reflected in option prices. A positive (+) value typically indicates that the implied volatility of dollar calls is higher than dollar puts, meaning the premium for USD-KRW appreciation risk is relatively larger. The decline in short-term RR25 suggests that hedging demand in anticipation of further sharp USD-KRW appreciation weakened following the Korea-Japan coordination signals and authorities' response.
However, 3-month and 1-year RR25 remained in positive territory at 0.55 and 0.92 respectively on the 8th. This is interpreted as the market stepping back from short-term exchange rate surge possibilities while not fully abandoning medium- to long-term won weakness concerns.
In the spot market, a pattern of immediate low-price buying and settlement demand following each sharp USD-KRW decline warrants attention. If custody-related dollar buying demand follows, USD-KRW could rise again.
Analysts Forecast Potential Decline to Mid-1,400 Won Range in Q3
Foreign exchange market experts appear more open to the possibility of medium- to long-term exchange rate declines. Since the recent USD-KRW appreciation was heavily influenced by supply-demand factors rather than deteriorating domestic fundamentals, downward pressure on USD-KRW could intensify in the second half if supply-demand conditions improve and yen weakness moderates.
Park Sang-hyun, a researcher at IM Securities, stated in a quarterly outlook report, "Recent USD-KRW appreciation was largely driven by supply-demand issues rather than fundamentals, and there is a possibility of a downward turn in Q3 reflecting improved dollar supply-demand and fundamentals." Considering disinflation progress, reduced uncertainty in the U.S. Federal Reserve's monetary policy, and moderation of the super-yen weakness phenomenon, he projected USD-KRW could fall to the mid-to-late 1,400 won range in Q3. He forecasted the exchange rate would decline to around 1,500 won in approximately one month and 1,480 won in three months.
Choi Kyu-ho, a researcher at Hanwha Investment & Securities, also stated in a second-half outlook report, "Considering the possibility of verbal intervention by forex authorities, we judge the short-term exchange rate ceiling to be 1,550 won," presenting a second-half range of 1,430–1,550 won.
FAQ
What caused USD-KRW to drop to the 1,510 won range on the 8th?
USD-KRW fell to the 1,510 won range on the 8th after Korean and Japanese forex authorities signaled coordinated communication on market intervention. Japanese Vice Finance Minister Atsushi Mimura emphasized close communication with Korean authorities, and Korean Deputy Finance Minister Moon Ji-seong confirmed frequent bilateral contact. Suspected smoothing operations by Korean authorities during low-liquidity hours further accelerated the decline.
How did the options market react to the USD-KRW decline?
Short-term USD-KRW upside caution in the options market weakened rapidly. The 1-month 25% delta risk reversal (RR25) declined from 0.77 on the 1st of this month to 0.18 on the 8th, and the 1-week RR25 dropped from 0.62 to 0.07 over the same period. However, 3-month and 1-year RR25 remained positive at 0.55 and 0.92 respectively, indicating medium- to long-term won weakness concerns persist.
What is the analyst outlook for USD-KRW in the second half?
Analysts forecast potential declines in the second half if supply-demand conditions improve. Park Sang-hyun of IM Securities projected USD-KRW could fall to the mid-to-late 1,400 won range in Q3, forecasting levels around 1,500 won in one month and 1,480 won in three months. Choi Kyu-ho of Hanwha Investment & Securities presented a second-half range of 1,430–1,550 won, with a short-term ceiling at 1,550 won considering potential verbal intervention by authorities.
