Korean stock markets are facing renewed concerns about yen carry trade unwinding risks similar to the August 5, 2024 circuit breaker event, when KOSPI plunged 8.8% and KOSDAQ fell over 11% following Nikkei's 12.4% crash. The Bank of Japan raised its benchmark rate to 1.0% from 0.75% last month, while Japan's 10-year government bond yield hit 2.90% on the 9th, the highest level since September 1996. Market analysts attribute the resurfacing concerns to similarities with August 2024 conditions: widening Japan interest rate differentials, excessive yen weakness, and tightening central bank environment. The yen carry trade, which involves borrowing low-interest yen to invest in higher-yielding overseas assets, has served as a global liquidity source for nearly 30 years since Japan entered its zero-rate era in the late 1990s.
KOSPI Circuit Breaker on August 5, 2024 Triggered by Nikkei Crash
The August 5, 2024 circuit breaker marked the first such event in over four years for Korean stocks. KOSPI closed down 8.8%, recording the largest single-day decline at that time, while KOSDAQ plummeted over 11%. The circuit breaker mechanism activates when the index falls 8% or more from the previous day's close and maintains that level for one minute.
The immediate trigger was Nikkei's 12.4% crash on the same day. That night, the US Nasdaq index fell over 6% intraday. Deteriorating US employment data sparked recession fears, driving simultaneous safe-haven demand and risk-asset selloffs. Analysts later identified supply-side factors: potential yen carry trade unwinding. The Bank of Japan had raised rates in July, and the dollar-yen exchange rate fell to 141 yen, strengthening the yen. Combined with US recession concerns, these conditions created an environment where yen carry trade liquidation could surge.
BOJ Rate Hike and Yen Weakness Raise Carry Trade Unwinding Concerns
Markets are revisiting yen carry trade issues due to vulnerabilities similar to August 2024. The Bank of Japan raised its benchmark rate from 0.75% to 1.0% last month. The current interest rate differential with the US exceeds 2.5 percentage points. The prevailing assessment is that the immediate impact on yen carry trades remains limited. However, investors may react sensitively to possibilities of currency intervention by authorities or additional rate hikes, given evaluations that yen weakness betting has grown excessively.
If Japan's benchmark rate faces further increases or the yen reverses to an upward trend, liquidation pressure on yen carry funds could intensify. When the yen appreciates, expected returns on assets held through carry trades diminish or may result in losses.
Japan 10-Year Bond Yield Reaches 2.90%, Highest Since 1996
Japan's 10-year government bond yield briefly surpassed 2.90% on the 9th in the bond market. This represents the highest level since September 1996, approximately 30 years ago. If overseas bargain-hunting inflows enter Japanese government bonds, it could become a downward factor for dollar-yen (yen appreciation). Additionally, if the upward trend in bond market rates continues, expectations for further Bank of Japan rate hikes could grow.
Market Focuses on JPY Exchange Rate and BOJ Policy Direction
The periodic dominance of yen carry trade unwinding fears stems from the immeasurable scale of yen carry funds distributed globally. The yen carry trade history spans nearly 30 years. Japan, mired in prolonged recession, opened the zero-rate era in the late 1990s, and from that point yen became the cheapest borrowing source globally. Investors borrowed yen to invest in high-interest assets in the US, Europe, and emerging markets. While yen carry funds have served as a global liquidity source for over 30 years, concerns are growing that the massive fund scale could boomerang at any time.
With Japanese rates entering a long-term upward trend, the trigger for future yen carry unwinding appears to be whether yen value rebounds. Given assessments that yen weakness has reached excessive levels, if an upward reversal opens, liquidation fears could spread rapidly. Market participants must monitor whether active intervention by Japanese currency authorities or expectations for additional benchmark rate increases will lead to yen value reversal. Even without actual liquidation, the possibility that concerns or fear psychology could be reflected in asset prices at any moment requires vigilance.
FAQ
What happened during the August 5, 2024 KOSPI circuit breaker event?
On August 5, 2024, KOSPI fell 8.8% and KOSDAQ dropped over 11%, triggering a circuit breaker for the first time in over four years. The crash followed Nikkei's 12.4% decline on the same day. Analysts later identified potential yen carry trade unwinding as a contributing factor, combined with US recession fears from deteriorating employment data.
Why are markets concerned about yen carry trade unwinding now?
Current market conditions resemble August 2024 vulnerabilities: the Bank of Japan raised rates to 1.0% last month, Japan's 10-year bond yield hit 2.90% on the 9th (the highest since September 1996), and excessive yen weakness persists. The interest rate differential with the US exceeds 2.5 percentage points. If yen value reverses upward or BOJ raises rates further, liquidation pressure on the estimated 30 years of accumulated yen carry positions could intensify.
What factors could trigger yen carry trade liquidation?
Key triggers include yen appreciation, additional BOJ rate hikes, and active currency intervention by Japanese authorities. Rising Japanese government bond yields could also fuel expectations for further rate increases. When yen strengthens, expected returns on assets held through carry trades diminish or turn into losses, prompting investors to unwind positions.
