US-JAPAN YIELD GAP TRACKER · 2026
US-Japan Yield Gap Tracker 2026: Carry Trade Dynamics, BOJ Normalization & USD/JPY
The US-Japan yield differential is the primary driver of carry trade flows in USD/JPY. This tracker monitors the spread across maturities, carry trade economics, and the fragility of convergence expectations as the BOJ normalizes.
QUICK ANSWER · AS OF Mar 24, 2026
What is the US-Japan yield spread in 2026?
The US-Japan 10Y yield spread is 205bp as of Mar 24, 2026 (US 4.35% vs JGB 2.3%). The 2Y spread is wider at 300bp. After FX hedging costs, the net carry is only 40bp — making the carry trade vulnerable to even modest JPY appreciation.
10Y Spread
205bp
2Y Spread
300bp
Net Carry
40bp
BOJ Rate
0.75%
The spread is narrowing — down from the 3-month average of 240bp. BOJ normalization is the structural driver. But the thin hedged carry (40bp) means the trade is fragile: a small JPY move can wipe out months of carry income.
YGFI 49/100 — US-JP 10Y spread at 205bp — narrowing, hedged carry only 40bp
10Y Spread
205bp
US 10Y
4.35%
JGB 10Y
2.3%
Current Yield Comparison
US 10Y Treasury
4.35%
10Y Spread
205bp
narrowing
JGB 10Y
2.3%
US 2Y
3.95%
JP 2Y
0.95%
2Y Spread
300bp
3M Avg (10Y)
240bp
Carry Trade Economics
Unhedged Carry
300bp
Hedging Cost
-260bp
Net Hedged
40bp
Breakeven Move
1.9%
Carry is thin after hedging (40bp). Unhedged carry attractive at 300bp but exposes to JPY appreciation risk. The trade is crowded (CFTC 18th percentile) and USD/JPY is 0.85 pts from MOF intervention threshold — squeeze risk is extreme.
BOJ Normalization Scenarios
BOJ hikes to 1.0% in Jun 2026, pauses to assess. Terminal rate ~1.25% by mid-2027.
Yield impact: JGB 10Y rises to 2.5-2.8%. US-JP spread narrows to ~160-180bp.
USD/JPY: USD/JPY drifts to 150-155 range. Intervention risk eases.
BOJ hikes to 1.0% in Apr 2026 (BofA forecast), signals further normalization. Wage growth and Iran war inflation support.
Yield impact: JGB 10Y spikes to 2.5-3.0%. Spread compresses to ~130-160bp.
USD/JPY: USD/JPY drops sharply to 145-150. Carry trade unwind accelerates. MOF intervention becomes unnecessary.
BOJ holds at 0.75% through H2 2026. Global slowdown from Iran war outweighs inflation concerns.
Yield impact: JGB 10Y stays at 2.0-2.3%. Spread remains at ~200-220bp.
USD/JPY: USD/JPY stays elevated near 158-162. MOF intervention likely if 160 breached.
Scenario probabilities are AhaSignals editorial estimates based on market pricing and public commentary. Not investment advice.
Yield Gap History
| Date | US 10Y | JGB 10Y | Spread | Event |
|---|---|---|---|---|
| 2022-01-01 | 1.63% | 0.07% | 156bp | Pre-hiking cycle |
| 2022-12-20 | 3.68% | 0.48% | 320bp | BOJ YCC band widened to ±0.50% |
| 2023-07-28 | 3.96% | 0.55% | 341bp | BOJ YCC further flexed to ±1.0% |
| 2023-10-31 | 4.93% | 0.95% | 398bp | US 10Y peak, BOJ YCC effectively dead |
| 2024-03-19 | 4.28% | 0.74% | 354bp | BOJ exits negative rates (0.0-0.1%) |
| 2024-07-31 | 4.14% | 1.05% | 309bp | BOJ hikes to 0.25% |
| 2025-01-24 | 4.62% | 1.22% | 340bp | BOJ hikes to 0.50% |
| 2025-12-19 | 4.4% | 1.8% | 260bp | BOJ hikes to 0.75% (unanimous, highest since 1995) |
| 2026-01-24 | 4.53% | 2.35% | 218bp | BOJ holds at 0.75%, JGB 10Y spikes to 2.35% |
| 2026-03-24 | 4.35% | 2.3% | 205bp | Current — JGB yields near 2008 peaks, Iran war driving US yields higher |
How the Yield Gap Affects Markets
The 205bp 10Y spread and 300bp 2Y spread still fund carry trades, though the spread has compressed significantly from 340bp+ in early 2025. Japanese institutional investors (lifers, pension funds) are reassessing USD allocations as JGB yields at 2.30% offer the most attractive domestic returns in decades.
With JGB 10Y at 2.30% (highest since 2008) and hedging costs elevated, Japanese lifers are increasingly repatriating USD assets back to JPY. This structural shift creates selling pressure on USD/JPY independent of rate differentials.
BOJ holds ~50% of outstanding JGBs. As it normalizes at 0.75% and signals further hikes, reduced purchases allow JGB yields to rise more freely. The 2.30% JGB 10Y reflects this structural shift from the YCC era.
The Iran war creates competing forces: USD safe-haven demand pushes USD/JPY higher, but JPY also benefits from risk-off carry unwinds. Oil price spikes disproportionately hurt energy-importing Japan, weakening JPY fundamentally. Net effect has been yen weakness (USD/JPY near 160).
Related Trackers
Frequently Asked Questions
- What is the current US-Japan yield gap?
- As of Mar 24, 2026, the US-Japan 10-year yield spread is 205 basis points (US 10Y at 4.35% vs JGB 10Y at 2.3%). The 2-year spread is 300bp. The spread is narrowing as BOJ normalization pushes JGB yields higher.
- How does the US-Japan yield gap affect USD/JPY?
- The yield gap drives carry trade flows — investors borrow in low-yielding JPY to invest in higher-yielding USD assets. The current 205bp 10Y spread supports USD/JPY at elevated levels. However, after FX hedging costs (~260bp), the net carry is only 40bp — making the trade vulnerable to JPY appreciation.
- What is the carry trade breakeven for USD/JPY?
- The unhedged carry trade breakeven is approximately 1.9% — meaning JPY can strengthen by about 1.9% before the carry is wiped out. With USD/JPY at 159.15, that translates to roughly 3.0 yen of JPY appreciation. Carry is thin after hedging (40bp). Unhedged carry attractive at 300bp but exposes to JPY appreciation risk. The trade is crowded (CFTC 18th percentile) and USD/JPY is 0.85 pts from MOF intervention threshold — squeeze risk is extreme.
- Will the US-Japan yield gap narrow in 2026?
- Most scenarios point to narrowing. The base case (50% probability) sees BOJ hiking to 0.75% in Q3 2026, pushing JGB 10Y to 1.8-2.0% and compressing the spread to ~200bp. A hawkish BOJ surprise (20%) could compress it to ~150bp. Only the dovish hold scenario (30%) keeps the spread wide at ~260bp.
- How does BOJ normalization affect the yield gap?
- BOJ normalization directly narrows the yield gap by pushing JGB yields higher. The BOJ raised its policy rate to 0.75% in January 2026 — the highest since 1995. As the BOJ reduces its massive JGB holdings (~50% of outstanding), market-determined yields rise further. Each 25bp BOJ hike typically adds 10-20bp to JGB 10Y yields.
Methodology
The Yield Gap Fragility Index (YGFI) measures how vulnerable carry trade expectations are to disruption:
- Spread Deviation (40%): 10Y spread deviation from 3-month average. Score = min(|deviation_bps| / 40 × 100, 100).
- Carry Thinness (30%): How thin the hedged carry is. Score = max(0, 100 - net_hedged_carry × 2).
- BOJ Normalization Distance (30%): Distance of BOJ rate from expected terminal. Score = (terminal - current) / terminal × 100.
Version: v0.1-beta. Known limitations: (1) Hedging costs are approximate from 3M basis swaps; (2) BOJ terminal rate is uncertain; (3) Repatriation flows are not directly observable.
Data Sources
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