US-JP 10Y Yield Differential
10-year Treasury yield minus 10-year JGB yield. Historically the largest cross-region differential and a primary driver of yen carry trade activity.
What is it?
The US-JP 10-year yield differential is the U.S. 10-year Treasury yield minus the Japanese government bond (JGB) 10-year yield. Historically the largest cross-region rate differential in the world due to the Bank of Japan's decades-long zero/negative rate policies, this metric is the primary driver of yen carry trade activity. When the differential widens, capital borrows in yen (low yield) to invest in U.S. assets (higher yield); when it narrows, carry trades unwind, with often violent cross-asset consequences.
How to read
Sustained values above +400bps coincide historically with active carry trade buildup phases - yen weakness, US asset rallies, equity and crypto tailwinds. Values below +200bps mark transition phases. Sharp narrowing events (> 50bps in days) historically coincide with major risk-off episodes triggered by BoJ policy shifts or U.S. recession expectations. Vertical markers annotate FOMC decisions, BoJ Monetary Policy Meeting decisions, and major carry trade unwind events.
Key zones
• Above +400bps: Extreme carry trade incentive, sustained yen weakness regime • +250 to +400bps: Active carry trade regime • +100 to +250bps: Mild carry incentive • Below +100bps: Carry trade unwind risk regime • Below 0bps: Hypothetical / unprecedented (would imply Fed below BoJ, has not occurred)
What to observe
• Differential rising rapidly while BoJ holds policy steady: classic carry incentive expansion • Differential collapsing alongside BoJ hawkish surprise: carry unwind imminent • Differential stable while USDJPY moves: speculation-driven yen moves vs fundamental rate-driven moves • Multi-year extremes: regime inflection points, watch for cross-asset implications via Carry Trade Detection composite
Historical context
The US-JP differential reached historic extremes (> 450bps) during the 2022-2023 BoJ-Fed maximum divergence (Fed aggressive hiking while BoJ maintained yield curve control near zero). The August 2024 BoJ rate hike triggered a sharp narrowing alongside the famous 'yen carry unwind' that crashed the Nikkei -12% in a single day and sent VIX spiking. Pre-2022, the differential typically ranged +100 to +300bps. The yen carry trade has been a structural feature of global markets since the early 2000s.
Expert notes
This differential is the single most important macro variable for understanding global risk-on/risk-off rotations driven by carry dynamics. The differential is a key input to the Trinity Carry Trade Detection composite. Pair this raw differential with the composite for diagnostic clarity: differential = the structural carry incentive, composite = the empirical carry pressure including USDX and commodities confirmation.
Common mistakes to avoid
• 'Differential is the only carry metric needed' - The differential measures the structural incentive, not the active flows. Use Carry Trade Detection composite for empirical activity. • 'BoJ near-zero forever guarantees wide differential' - BoJ has gradually unwound YCC during the recent monetary normalization phase; the structural assumption is no longer valid. • 'Wide differential = automatic yen weakness' - Yen moves are also driven by current account, MoF intervention, and risk sentiment.
Programmatic access
REST API
curl -sS \
'https://api.trinityinsights.io/api/v1/macro-intelligence/macro-v2-us-jp-10y-yield-differential/history?days=90' \
-H 'X-API-Key: $TRINITY_API_KEY'MCP server
{
"tool": "get_chart_value",
"metric_id": "macro-v2-us-jp-10y-yield-differential",
"timeframe": "1y"
}Required tier: pro. See the pricing grid for the tier list and the MCP documentation for multi-client configuration.
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Institutional disclaimer
Trinity Insights is an educational and analytical tool. The metric above does not constitute investment advice. Trinity Insights is not a Crypto-Asset Service Provider (CASP) registered under MiCA Regulation (EU) 2023/1114. See the full disclaimer.