Japan 40-Year JGB Auction Demand Hits Strongest Level Since March 2025
Claire Weston
Japan's 40-year bond auction drew a bid-to-cover ratio of 2.82 — the strongest since March — as policy signals boosted ultra-long demand, though fiscal expansion and slow rate hikes remain unresolved risks.
How strong was this auction?
The bid-to-cover ratio — a measure of how many buyers compete for each unit of debt — rose to 2.82, up from 2.702 at the previous sale and well above the one-year average of 2.55.
This means → for every yen of 40-year bonds the government offered, buyers bid nearly three times that amount. Sentiment has clearly warmed from earlier months.
Prices were roughly flat after the result, suggesting the improvement was already partly priced in.
What drove the demand?
Government officials recently stressed the importance of GPIF — Japan's government pension fund and one of the world's largest — increasing its domestic financial-asset holdings. That lifted confidence directly.
Finance Minister Satsuki Katayama proposed adding government bonds to the tax-free NISA savings programme. In plain terms = ordinary savers would get a tax break for buying JGBs, opening a new retail demand channel for ultra-long debt.
Japanese insurers bought the most ultra-long bonds in three years last month. Meiji Yasuda Life said it may add up to ¥1 trillion in the 2026 fiscal year.
Is this recovery a one-off?
Not just the 40-year. Last week's 20-year auction saw a bid-to-cover ratio near April levels — and April had set a seven-year high.
The 40-year yield now sits around 3.895%, down roughly 46 basis points from the 4.355% record hit in May.
This reflects multiple demand channels — pensions, insurers, retail — opening at the same time. The ultra-long market is moving out of the panic mode that defined May.
Where are the risks?
Prime Minister Sanae Takaichi's expansionary fiscal agenda is the biggest overhang. The cabinet's annual economic-policy guidelines mention central-bank independence, but a costly food-consumption-tax cut remains unresolved.
This means → if the tax cut goes ahead, the government will need to issue more debt, potentially breaking the supply-demand balance that just began to recover.
The BOJ raised rates last month to the highest since 1995, yet markets worry the pace is still too slow to contain inflation. A weak yen keeps pushing up import costs and adding to price pressure.
What comes next?
The BOJ meets next week. Whether it signals further tightening will determine if the ultra-long demand recovery can last.
In plain terms = this auction proved the market is still willing to lend Japan money for 40 years — but only if policymakers stop adding new uncertainty.
Content is for reference only, not financial advice.