40-Year Government Bond Yield by Country
Latest released 40-Year Government Bond Yield value for every supported currency, with the previous reading, the change between releases, reference date, frequency, unit, and source.
Government Bond Yields
40-Year Government Bond Yield across supported currencies
1 with data
1 supported currencies
Each row links to the per-currency reference page and the underlying API endpoint at
/api/v1/announcements/{currency}/gov_bond_40y. Non-USD endpoints require an API key query parameter.| Country / Currency | Latest | Previous | Change | Reference | Frequency | Unit | Source |
|---|---|---|---|---|---|---|---|
|
Japan
JPY · Japanese Yen
|
3.74
30 Apr 2026
|
3.66
28 Apr 2026
|
▲ +0.08 | 30 Apr 2026 | Daily | Percent | MOF |
What is 40-Year Government Bond Yield?
The 40-year government bond yield is an ultra-long maturity issued by a small set of sovereigns (notably Japan and the UK). It is the most term-premium-sensitive curve point.
Why it matters for FX
40y yields matter for pension-fund and insurance hedging, and in Japan particularly for life-insurance ALM under negative-rate regimes. Sharp moves are typically driven by supply-demand technicals rather than fundamentals.
How to read this page
Compare to 30y for the slope at the very long end. Treat individual print moves with caution given thin liquidity.
What to watch for
- 30y-40y slope
- Pension and insurance hedging flows
- Issuance schedule changes
- Liquidity premium at the ultra-long end
- Cross-currency comparison only where issued