Spot
195.76
52wk: 181.48–204.41
6M Roll (illustrative)
~+100 pts
Credits the short, not a cost
Rate Differential
BOJ > SNB
BOJ 1.00% vs SNB 0.00%
Carry Trade Size
~$20T est.
Deutsche Bank (Saravelos), 2024
2026 Trend
Rolling over
Below 50d & 200d avg
The Case — In My Own Words
1 · The Yen Carry Trade Is Still Enormous, and It's Aging
- Deutsche Bank's George Saravelos: ~$20 trillion, ~505% of Japan's GDP — consolidated Japanese government balance sheet, GPIF, BOJ, state-owned banks.
- This is a 2024 estimate being recirculated on social media as if it's new. It isn't — but nobody has produced a credible reason to think the trade has shrunk since.
- Conservative estimates (BIS ~$250bn core; broader $1–14tn with leverage/derivatives) still point the same way: one of the largest, most crowded macro trades in the world.
2 · The Political Cover for a Hike Just Changed
- Bloomberg, 13 Aug: PM Takaichi's government now supportive of a faster BOJ hike, live as soon as September.
- BOJ already at 1% — a 31-year high. Board member Takata has floated 1.25% directly.
- Risk: political support isn't a hike. April/May intervention (~$73bn) bought six weeks before USD/JPY reclaimed 160 — intervention credibility is fading. Needs the BOJ committee to actually move.
3 · Not “Flight to CHF Safety” — CHF Sold to Fund the Trade That Replaces the Yen
- Mid-July 2026 reporting: franc (with euro) emerging as the market's “funder of choice” as traders grow wary of further BOJ-linked intervention risk in yen carry.
- If capital rotates from yen-funded to franc-funded carry: JPY strengthens on the unwind side while CHF gets sold to fund the replacement. Both legs point the same way.
- Consistent with GMD's standing view — Goldman named CHF the preferred G10 carry funding currency, July 2026.
4 · CHF's Safe-Haven Premium Has Been Fading All Year
- Standard objection: “JPY and CHF are both havens, they'll move together.” The 2026 data doesn't support that.
- CNBC (Feb), FXStreet (Jul): CHF specifically losing safe-haven flows, mainly to USD — a near-zero-yield currency can't compete once markets expect higher rates elsewhere.
- Middle East-driven risk-off this year has tended to favour USD over CHF, not CHF itself.
5 · The Carry Has Quietly Flipped in My Favour
- BOJ 1.00% vs SNB 0.00% — for the first time this cycle, shorting CHF/JPY earns carry instead of paying it.
- Illustrative 6M roll from published policy rates: ~+100 points, ~50bp credited over the period.
- My own back-of-envelope figure from stated policy rates, not a quoted market forward — confirm actual swap points with the broker. A tailwind, not the reason for the trade.
6 · The Precedent Already Exists — August 2024
- Same catalyst fired once before: BOJ's July 2024 hike triggered the last carry unwind shock.
- CHF/JPY: 177.27 (21 Jul) → 169.04 (5 Aug), −4.8% in two weeks. CHF did not hold up as a fellow haven.
- Strongest evidence against the “they move together” objection — it already happened, on this exact pair, on this exact catalyst.
Carry Mechanics — The 6-Month Roll (Illustrative)
Rate Differential & Roll, From Published Policy Rates
| Component | CHF (short) | JPY (long) | Differential |
|---|
| Policy rate | 0.00% | 1.00% | +100bp (favours short) |
| 6M roll (illustrative, from policy rates) | ~+100 pts on CHF/JPY, credited to the short | Confirm with broker |
| Annualised carry (illustrative) | ~+100bp gross · ~+0.5% per 6M period |
Why This Is Different to Every Other Recent CHF/JPY Short
- For most of the last decade CHF yielded more than JPY, so shorting this pair meant paying carry. BOJ's June 2026 hike to 1% flipped that — the funding leg now pays.
- This is a small, recent, and reversible differential — a single SNB move or a BOJ pause could narrow or flip it back. Treat it as a minor tailwind, not a reason to hold the position longer than the thesis justifies.
- Unlike the GBP/CHF carry trade GMD has open, the differential here is modest (100bp vs 375bp) — this trade's edge is the fundamental catalyst, the carry is a bonus on top.
Illustrative Trade Structure
A position trade built around a specific policy catalyst (a live BOJ hike, not just rhetoric). Levels below are what I'm watching — a framework, not prescription. Prices are settlement references as of 14 August 2026, not executable quotes.
DirectionSHORT CHF / LONG JPY
Spot Reference (14 Aug 2026)195.76
Entry ZoneSpot, current levels · rolled 6-monthly via forward/swap
Hard Stop (thesis invalidation)205.50 — above the recent swing high
Target 1Low 180s · ~+8% from spot
Target 2 (structural)Mid 160s · ~+16% from spot · broadly the Aug 2024 post-shock zone
Roll (illustrative)~+100 pts / 6M · credits the short · confirm with broker
Risk/Reward (T1 vs stop)~1.6:1
Risk/Reward (T2 vs stop)~3.2:1
HorizonEvent-driven — watch the September BOJ meeting as the primary trigger
Position Sizing Reference — Illustrative Only
- 1,000,000 CHF short, stopped out at 205.50 from 195.76 entry: (205.50 − 195.76) × 1,000,000 = 9,740,000 JPY.
- ≈ £45,300 at the GBP/JPY rate on 14 Aug 2026 (215.05). Illustrative only — not a recommended position size.
Risk & Caution Assessment
✓ SUPPORTIVE
- A live September move. BOJ actually hikes, not just talk — clearest confirmation available.
- Further CHF safe-haven erosion. Removes the main counter-argument to this trade.
- A genuinely broad, global risk-off shock. This isn't a threat to the thesis — it could easily be the catalyst that actually unwinds the yen carry trade. A scramble to de-risk is exactly the kind of event that forces the BOJ's hand and drives the funding-currency rotation this trade depends on.
△ MONITOR
- Verbal intervention without action. Takaichi's "support" could stay rhetoric. Japan's own intervention record this year (record spend, six weeks of relief) shows the market's losing patience with talk. A September hold with vague guidance means re-examining the thesis, not just waiting.
- SNB responds. SNB has shown it will intervene to manage the franc. Disorderly CHF weakness could draw a policy response that works against this trade regardless of what the BOJ does.
- Wrong type of shock. CHF and JPY don't play the same defensive role in every crisis — the franc tends to outperform in European or Middle East-driven stress, while the yen's defensive response concentrates specifically in global deleveraging events. This trade is built on the latter. If a Middle East or European shock hits instead of (or alongside) a clean BOJ-driven unwind, CHF could catch a bid on its own merits, independent of the funding-currency argument — a real risk to the position, not one the thesis cancels out.
Monitoring: What Confirms vs Invalidates
✓ Green Lights — Hold / Add
- BOJ actually hikes in September or October — the core catalyst delivers, not just talk.
- Further reporting confirms CHF as the new funding currency of choice — the divergence mechanism strengthens.
- USD/JPY fails to hold below 160 on any fresh intervention — confirms intervention alone isn't fixing the underlying pressure, and the BOJ has to act on rates instead.
- CHF continues underperforming as a safe haven in any fresh risk-off episode — removes the main objection to the trade.
✗ Red Flags — Re-evaluate / Exit
- Daily close above 205.50 — hard stop. Exit. This isn't a level to argue with.
- September BOJ meeting produces a hold with no clear forward signal — the political-support pillar was rhetoric, not delivery. Thesis needs re-examining.
- SNB signals active intervention against CHF weakness — a policy-level headwind to the trade.