Japan’s Finance Ministry set the coupon on its new 10-year bond at 3.1 percent in Tuesday’s auction, the highest level in about 30 years, as the world’s second-largest sovereign bond market continues to reprice around rising inflation and interest rates. The coupon, the interest rate the government pays annually on new issuance, rose from 2.7 percent at the previous auction in September, according to Kyodo News. The Ministry reviews the 10-year coupon quarterly to keep it aligned with prevailing market rates.
The auction itself went through cleanly. Competitive bidding totaled 7,401.1 billion yen against 1,966.1 billion accepted, a bid-to-cover ratio of 3.76x, the strongest reading since May 2026 and above the 12-month average of 3.21x. The weighted average yield was 3.101 percent, up from 2.995 percent at the September auction, while the highest accepted yield was 3.103 percent, a price tail of just 0.02, the tightest such tail since June 2025. Non-competitive bids added 1.85 billion yen and a separate auction for JGB market special participants took 631.5 billion, bringing the total offered to about 2.6 trillion yen. The bonds settle October 7 and mature September 20, 2036.
The calm on the 10-year sits against a tenser long end. The 20-year yield traded near 3.98 percent after brushing a three-decade high, and the 30-year hovered just below its record open around 4.24 percent. Politics is part of the backdrop: Prime Minister Sanae Takaichi said she would “control” issuance and respond quickly to market turbulence, comments that put Japan’s already-heavy public debt back in focus as fiscal 2027 budget requests reportedly head toward 140 trillion yen.
The next catalyst is the Bank of Japan. OIS pricing puts about a 12 percent chance on a 25bp hike at the October 29-30 meeting and roughly 90 percent on a hike by December, after Governor Kazuo Ueda addresses the National Securities Conference later Tuesday. Japan’s second-quarter output gap increased to plus 0.55 percent from plus 0.36 percent, a sign demand is running above capacity that strengthens the case for further tightening.