40-Year Government Bond Yield by market
Latest available observation for each published market.
Sovereign rates
40-Year Government Bond Yield by Country
Compare the latest available 40-year government bond yield across 2 markets with verified stored observations — Japan, and United Kingdom. Additional country pages are retained and labelled separately while their observation coverage is completed.
Compare 40-Year Government Bond Yield across markets
Every published country page in one ranked table. Latest readings appear first; open any row for its historical series and source detail.
| Market | 40-Year Government Bond Yield | Change | Trend | 52W range | vs 10Y | As of | Source |
|---|---|---|---|---|---|---|---|
| United KingdomGBP | 5.69% | +3 bp | 4.95–5.69% | +45 bp | 2026-09-02 | Bank of England | |
| JapanJPY | 4.06% | -7 bp | 3.29–4.14% | +110 bp | 2026-09-03 | Ministry of Finance |
Understanding the 40-year government bond yield
The 40-year sector is the long end of the government bond curve. Long-bond yields carry the market's slowest-moving judgements: trend inflation over decades, the expected path of real rates, and a term premium that compensates investors for holding duration risk through many policy cycles.
Long-end yields respond to different forces than the short end. Central-bank meetings move 2-year yields directly, while 40-year yields react more to fiscal deficits and bond supply, pension and insurance demand for duration, and shifts in long-run inflation credibility. A steepening gap between 10-year and longer yields often signals rising term premium rather than changing rate expectations.
Fewer sovereigns issue at 40 years than at benchmark maturities, so coverage is narrower than the 10-year page. Verified stored observations currently cover Japan, United Kingdom. Every series is collected from the official national publisher — Bank of England, Ministry of Finance — never from third-party aggregators, so readings match the figures each institution publishes.
40-Year Government Bond Yield data by country
2 of 2 country pages have verified stored observations for this maturity.
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Government bond yield questions
What is a 40-year government bond yield?
It is the market yield on a government security with roughly 40 years to maturity. It reflects the government's cost of borrowing at that horizon and the compensation investors demand for inflation, rate risk, and duration over the life of the bond.
Which markets publish a 40-year government bond yield?
Verified stored observations currently cover Japan (Ministry of Finance), United Kingdom (Bank of England). Country pages without verified observations are labelled separately and must not be read as evidence that a current observation is available.
Why do some countries have no 40-year yield?
Not every sovereign issues bonds this long, and some central banks only publish benchmark yields out to 10 years. Where an official long-maturity series does not exist, the maturity is simply absent rather than being estimated from other data.
What does the spread between 10-year and 40-year yields show?
The long-end slope is a common gauge of term premium and fiscal risk. A widening spread can signal growing long-run inflation uncertainty or heavier long-bond supply; an inverted long end often reflects strong duration demand from pensions and insurers.
How can I view more maturities for one country?
Open a country page from this directory, then use its Government Bond Yields link to see every published maturity for that market, or switch maturities with the selector at the top of this page.
Can I access this data via API?
Yes. Every series on this page is served by the announcements endpoint, for example /api/v1/announcements/jpy/gov_bond_40y — see the API documentation for authentication and history depth.