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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.
/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
|
3.65
|
3.69
|
▼ -0.04 | Daily | % | Ministry of Finance |
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
AI Answer-Ready
Key Facts
- Page
- Gov Bond 40y
- Section
- Indicators
- Canonical URL
- https://fxmacrodata.com/indicators/gov_bond_40y
- Source
- FXMacroData editorial and official publisher references
- Last Updated
- See page metadata
Provenance And Trust
Cite the canonical URL and source field above. Where available, this page maps to official publisher releases and timestamped updates.
Quick Q&A
What is this page about? This page explains Gov Bond 40y with directly usable context for trading, research, and API workflows.
What source should be cited? Use the canonical URL and the listed source field; cite official publisher references when available.
How fresh is this content? The last updated value above reflects the page metadata or latest available data timestamp.
Can this be used in AI assistants? Yes. This section is intentionally structured for retrieval and citation in chat assistants.
Prompt Packs
Use these in ChatGPT, Claude, Gemini, Mistral, Perplexity, or Grok for consistent source-aware outputs.