- On Thursday, Japan's 10-year government bond yield rose to 2.745%, the highest since May 22, as the market viewed the latest auction results as a direct signal of weakening demand, driving long-term interest rates higher.
- The tail difference in this 10-year bond auction widened from 0.05 points last time to 0.2 points, reflecting a significant deterioration in the distribution of bid prices, indicating that investors' willingness to take on Japanese bonds at current prices is declining.
- Deeper concerns stem from the fiscal side. Traders are beginning to question whether the government's continued expansion of spending will truly lead to strong enough economic growth in the future to justify the increased supply, and this doubt is raising the term premium.
Widening Tail Difference Exposes Weak Demand
The so-called widening of the tail difference means that the gap between the average winning bid price and the lowest winning bid price has increased, which is usually interpreted as dispersed buying and lack of confidence. For the Japanese government bond market, which is already sensitive to supply, such signals often quickly push up yields.
Long-Term Yields Rise in Tandem
In addition to the 10-year bond, the 30-year government bond yield also rose to 4%, and the 5-year yield rose to 1.925%. This indicates that the market is not only reacting to a single maturity but is reassessing the overall pressure of Japanese government bond supply and fiscal expansion over the coming period.
Fiscal Spending Expectations Become Core Variable
Analysts worry that if large-scale spending plans cannot be translated into higher potential growth, it will only increase the burden of bond supply. For investors, the higher the uncertainty of growth realization, the higher the required return on holding bonds.
Subsequent Auctions Will Continue to Test Sentiment
Next week, the 30-year government bond will continue to be auctioned, and the market will use this to observe whether long-term funds are willing to re-enter at higher interest rate levels. If demand remains weak, Japan's long-term yields may continue to face upward pressure in the short term.
