# Japan Hikes Rates and the Yen Falls Anyway After a Split Vote - G10 FX Weekly - Week of September 21, 2026

> G10 FX Weekly for the week of September 21, 2026. Podcast synthesis on the Bank of Japan's split 7-2 hike to a 31-year high and the yen falling anyway, rate checks as dollar-yen neared 158, why the yen bulls got squeezed, the Bank of England's dovish gilt-sale freeze, the Swiss franc and Swedish krona as funders, and the French-German spread near 100 basis points.

## G10 FX Weekly

### Week of September 21, 2026: Japan Hikes Rates and the Yen Falls Anyway After a Split Vote

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Last week the whole newsletter pointed at one date on the calendar: the Bank of Japan meeting. The yen had been the trade of the summer, and the smart money (State Street, J.P. Morgan, a chorus of macro voices) was betting that Japan's central bank would finally raise rates hard enough to send the yen higher for good.

On Friday the meeting came. The Bank of Japan did raise rates, to their highest level in 31 years. And the yen fell.

That is the story this week, and it is worth sitting with, because it is the opposite of what almost everyone expected. A central bank tightened policy and its currency got weaker, not stronger. The reason why (a split vote, two dissenters, and a governor who wouldn't bang the table) tells you almost everything about where the four currencies we follow go from here. Let's get into it.

## TL;DR

* *The Bank of Japan raised rates to 1.25%, a 31-year high, and the yen dropped about 1.2%.* The problem wasn't the hike, it was the message: a divided 7-2 vote, with the two people voting against being recent, dovish appointees of the new prime minister. Markets read that as "they're not really committed," and sold the yen ([Squawk on the Street](http://url7324.matterfact.com/ls/click?upn=u001.idHmPrr2Geh7KYLAsTy7NkrIVb-2FgA4pmf2rMXQwGcOhNMprFN9YM9pc8Xt5lZg5BLl0vP9dRPZo7uCjZ0EDua2V-2B2CA1Ykw2NxtCMneVw5rBOTHdQzaJvaa-2BlXqNW9etD8Gh4OItrrn1LMD1vodLUw-3D-3D4pOk_7mLGwmUci-2BLaXswv9WX1yTgqn3Wad-2FotHhzHgSNAZbWXt6ukpLDSEZO7JJh2hxIXUKjEx53FMRLvfrTiBIKAsfj5isafiedZrd3PvzpeoY2YL5kYn0Q9E1-2FjH-2FW2NpuUM1IJahrOZT2oRvkDdC-2FjObLjy8-2FtWoB55yugEnpkbAYoYc4NWYzStHC7Iexxxtprhy2O6DqrJUaESA70QpMa-2BA-3D-3D), Sep 18).
* *Dollar-yen pushed toward 158, and then Japan blinked.* Reports of official "rate checks," a classic warning shot before a central bank steps into the market, pulled the yen back up ([NAB Morning Call](http://url7324.matterfact.com/ls/click?upn=u001.idHmPrr2Geh7KYLAsTy7NkrIVb-2FgA4pmf2rMXQwGcOgjjBvvm0HFu7XrihkCqrzYTVYFsWXs0f8VahSZb8nzk9hmJPIC8nV98TNj5QmgSyJ6FEBCXRshyw-2BAUvJPvS-2Bi85Hf6e1AKUg5H7yyg61brQ-3D-3Do0zu_7mLGwmUci-2BLaXswv9WX1yTgqn3Wad-2FotHhzHgSNAZbWXt6ukpLDSEZO7JJh2hxIXUKjEx53FMRLvfrTiBIKAsb59HBLtEpH5QlUTJ7acB6y1X308wfCEL4-2BXnWDuhS98Mr8BINcS7fZ8SnIJIYLFf9pf1H5T3vKJHT3U58-2FzvnDOBcyDHzQac5nVT8R2eWif3-2BkRZ-2B2D-2FSojczzoj-2BFSlw-3D-3D), Sep 20). The danger zone is real: J.P. Morgan puts the technical line at roughly *158.4*, and above it "the whole 160 situation comes into effect" ([Saxo Market Call](http://url7324.matterfact.com/ls/click?upn=u001.idHmPrr2Geh7KYLAsTy7NkrIVb-2FgA4pmf2rMXQwGcOisZ6dE4FL9aISid56Yo1LbY-2FSnEaWmauknlKFKtPO02PNGziRqg81jcgVsuHVX4ulcKb7MM5ENB0J-2FbNAlyku2xRZ-2BMhzvqh0UjOZRNPrt1A-3D-3Dridg_7mLGwmUci-2BLaXswv9WX1yTgqn3Wad-2FotHhzHgSNAZbWXt6ukpLDSEZO7JJh2hxIXUKjEx53FMRLvfrTiBIKAse1mdj-2B-2FOUhw2A-2F1T-2F5vsNoj4oRsJcvpIwhyZK-2BE65CiOyMAQZNP5ClZ78tfLR5y5WWN1rwhcbTQTWlyHay7tJhctLr1imcyM-2BGKv7JgPQo1MToqFI5hx1LFtlibgfuUaw-3D-3D), Sep 18).
* *The yen bulls got squeezed.* J.P. Morgan's Junya Tanase, bullish the yen last week, now says the dissent "could reignite behind-the-curve concern… and weaker yen," and that the market's bet on four more Japanese hikes is likely to be trimmed ([At Any Rate](http://url7324.matterfact.com/ls/click?upn=u001.idHmPrr2Geh7KYLAsTy7NkrIVb-2FgA4pmf2rMXQwGcOgY0cn4hZzX8tqB43X4pXwaKqixhBrwC5Vr56e-2BleB06Zyt92epCPivn5HMirL1AllqOj4gek8klkZmABfvhql0oOB4enI7psjcX5s0PQno8w-3D-3DfJcL_7mLGwmUci-2BLaXswv9WX1yTgqn3Wad-2FotHhzHgSNAZbWXt6ukpLDSEZO7JJh2hxIXUKjEx53FMRLvfrTiBIKAsTIG8tpD-2BslB9LPXIr1MgFK6Z5-2Bi34K8KjH3xBqY-2BFiDJo9ZK8oP5-2BBP7GRWV-2By5a6k1l73LtKdvuBjRc9wCJAXkdbRoniWWTs45LLtFcsJqShuCkp06FrVFS10X7JX1BA-3D-3D), Sep 18).
* *A milestone worth pausing on:* "For the first time ever, the Federal Reserve, European Central Bank and Bank of Japan have all raised interest rates in the same month" ([Big Take Asia](http://url7324.matterfact.com/ls/click?upn=u001.idHmPrr2Geh7KYLAsTy7NkrIVb-2FgA4pmf2rMXQwGcOgN7-2FgBnsT3fR2zQLPbKJ78aedVn4fPoTvAhqU-2BIyvctW-2FUpmG4i6MU20hRrndV6cDJ-2FsSrQdd2eSPbapei8Rhnxj9N9x8BpQFosYfZ8W82Kw-3D-3D2cvw_7mLGwmUci-2BLaXswv9WX1yTgqn3Wad-2FotHhzHgSNAZbWXt6ukpLDSEZO7JJh2hxIXUKjEx53FMRLvfrTiBIKAsZpj6-2BXttZeT0-2FEFIvTR7cSes-2BmzCgxYmiDlGaRUtCE4AUVYJTQGAq-2FVH7-2BOoCCS6ea5bItcNpQeREytF52cqle0x2CpJtySPFK8IKNVwYW3fg-2BJZ0vrkcF4nia8AqaLAw-3D-3D), Sep 18).
* *The Bank of England sat still, and surprised everyone dovishly anyway.* It held at 3.75% for a ninth month (a 6-3 vote), then unexpectedly froze its bond sales for six months. That rallied long-dated UK government bonds hard: the 30-year yield fell 12 basis points in a day ([Saxo Market Call](http://url7324.matterfact.com/ls/click?upn=u001.idHmPrr2Geh7KYLAsTy7NkrIVb-2FgA4pmf2rMXQwGcOisZ6dE4FL9aISid56Yo1LbY-2FSnEaWmauknlKFKtPO02PNGziRqg81jcgVsuHVX4ulcKb7MM5ENB0J-2FbNAlyku2xRZ-2BMhzvqh0UjOZRNPrt1A-3D-3Dtwas_7mLGwmUci-2BLaXswv9WX1yTgqn3Wad-2FotHhzHgSNAZbWXt6ukpLDSEZO7JJh2hxIXUKjEx53FMRLvfrTiBIKAsQGehVlL6GHYxxLW3F6KiPIGzFn3uyha-2BhwXVzJXJxtdYB-2FgG7ynQfZr75zPhtiW2wlZZoX9duFcGZE7QUIOsrw8wYgM5lfH-2B1n-2F4vfUpuf7rHSwAN01Ni113zzAv9Y-2B2A-3D-3D), Sep 18).
* *Sterling is still the desks' favorite major.* J.P. Morgan stays bullish the pound as "a relative high-yielder within G10" with "growth [that] has continued to beat," pointing to a "blowout retail sales report" ([At Any Rate](http://url7324.matterfact.com/ls/click?upn=u001.idHmPrr2Geh7KYLAsTy7NkrIVb-2FgA4pmf2rMXQwGcOgY0cn4hZzX8tqB43X4pXwaKqixhBrwC5Vr56e-2BleB06Zyt92epCPivn5HMirL1AllqOj4gek8klkZmABfvhql0oOB4enI7psjcX5s0PQno8w-3D-3D1JnT_7mLGwmUci-2BLaXswv9WX1yTgqn3Wad-2FotHhzHgSNAZbWXt6ukpLDSEZO7JJh2hxIXUKjEx53FMRLvfrTiBIKAsY3orFPGhvd2lxWVlp9D2fd2oUXIAoq4IrEgfhvTtEErUoVhycMYKNfTuVIxvY5QheFll8lUjG-2BzzqJF3OaR9N-2FZdvz2aXEbymBZYJhzc6KM322io9anw1cPE3KvuyHlig-3D-3D), Sep 18).
* *The Swiss franc stays the market's designated funding currency.* The Swiss National Bank is expected to hold at zero this Thursday; Swiss inflation is just 0.8%, and, notably, "the franc has depreciated notably over the past six months, which has eased prior deflationary pressures" ([Nomura – The Week Ahead](http://url7324.matterfact.com/ls/click?upn=u001.idHmPrr2Geh7KYLAsTy7NkrIVb-2FgA4pmf2rMXQwGcOjwUIBt2qmZHHaU6BhTGUOm0E8sQ-2BbPHNykwr34ybuNYvvtNWwKVMJjtgnbT0dZUEBVLhtFVZCyr9azBNvLEG0DZmaXZVOfbWi1-2B4YJ0e-2FnxA-3D-3DKin8_7mLGwmUci-2BLaXswv9WX1yTgqn3Wad-2FotHhzHgSNAZbWXt6ukpLDSEZO7JJh2hxIXUKjEx53FMRLvfrTiBIKAscuZ9lRGlaQNL9dM4mYm2nzgN7KXpGGuc3Ci41lYSaaJu02M8WYb9wRgstKIevGAHPRlCJfLSr6Ip-2B6cd7SEmj4n-2Fxy9bvLwLxkBy-2FX4oYnVeslXQYcto7jCOJ36zcqa0w-3D-3D), Sep 18).
* *Europe's slow-burn risk is still smoldering.* The gap between French and German borrowing costs sits at 98 basis points, near where analysts start using the words "sovereign debt crisis," and German state elections this weekend keep the pressure on Chancellor Merz ([Saxo Market Call](http://url7324.matterfact.com/ls/click?upn=u001.idHmPrr2Geh7KYLAsTy7NkrIVb-2FgA4pmf2rMXQwGcOisZ6dE4FL9aISid56Yo1LbY-2FSnEaWmauknlKFKtPO02PNGziRqg81jcgVsuHVX4ulcKb7MM5ENB0J-2FbNAlyku2xRZ-2BMhzvqh0UjOZRNPrt1A-3D-3DgjFy_7mLGwmUci-2BLaXswv9WX1yTgqn3Wad-2FotHhzHgSNAZbWXt6ukpLDSEZO7JJh2hxIXUKjEx53FMRLvfrTiBIKAsSD7DyIA1Lz0GC8UU9xHtLiSzbq9iQBmOktla45ZZcQcegXBQRKtGSS6Jn8gGgoYC6GZs-2Fxqg0TUbtWc5VJbpKRY0Qq0gRc4ID-2BZlPJ1403PHi7BCoank2B1iHFtyw4dZA-3D-3D), Sep 18; [Nomura](http://url7324.matterfact.com/ls/click?upn=u001.idHmPrr2Geh7KYLAsTy7NkrIVb-2FgA4pmf2rMXQwGcOjwUIBt2qmZHHaU6BhTGUOm0E8sQ-2BbPHNykwr34ybuNYvvtNWwKVMJjtgnbT0dZUEBVLhtFVZCyr9azBNvLEG0DZmaXZVOfbWi1-2B4YJ0e-2FnxA-3D-3D6HdU_7mLGwmUci-2BLaXswv9WX1yTgqn3Wad-2FotHhzHgSNAZbWXt6ukpLDSEZO7JJh2hxIXUKjEx53FMRLvfrTiBIKAsbnRhuDwcw45WbQUfJAZTzEOPImpplSM3LPWv4xANc63O6iGKTY6WZYvPdZSlqZaVc22v5HjH9HlJYqvAsooYfVowcd5iAqPNkHIis2VhPGetyD2HMu0rsmMNpaXApe8QA-3D-3D), Sep 18).

## What's New

### 1. Japan raised rates, and the message, not the move, sank the yen

Start with what actually happened. On Friday the Bank of Japan lifted its policy rate by a quarter-point to *1.25%*, the highest it has been in 31 years. That part was fully expected. What mattered was the *how*.

The decision was a split, *7 votes to 2*. And as Bloomberg's Tokyo correspondent Paul Jackson explained on [Big Take Asia](http://url7324.matterfact.com/ls/click?upn=u001.idHmPrr2Geh7KYLAsTy7NkrIVb-2FgA4pmf2rMXQwGcOgN7-2FgBnsT3fR2zQLPbKJ78aedVn4fPoTvAhqU-2BIyvctW-2FUpmG4i6MU20hRrndV6cDJ-2FsSrQdd2eSPbapei8Rhnxj9N9x8BpQFosYfZ8W82Kw-3D-3DqdMS_7mLGwmUci-2BLaXswv9WX1yTgqn3Wad-2FotHhzHgSNAZbWXt6ukpLDSEZO7JJh2hxIXUKjEx53FMRLvfrTiBIKAsfozsgT58NcE8udX5ObPcCHxbnJWkdfnZvA-2BfEGGwsy8t8AOU67851OqvXw0-2BRFZRbP7HDLiUbMTf1L42tk21OX3dAb-2B2EtQ8WP7uyh-2BLE26429B0P7DM6frXKm5rakZyg-3D-3D) (Sep 18), the two people who voted *against* the hike were not random skeptics. They were "planted on the board by the Prime Minister, Takeichi, who we know is a bit reluctant to have interest rate hikes." In plain terms: the government has been quietly stacking the committee with people who don't want to tighten, and this was the first time markets saw them show up in the vote count.

Governor Kazuo Ueda then had a chance to reassure everyone at his press conference, and didn't quite manage it. He explained the hike as getting ahead of inflation. As CNBC's Sarah Eisen relayed on [Squawk on the Street](http://url7324.matterfact.com/ls/click?upn=u001.idHmPrr2Geh7KYLAsTy7NkrIVb-2FgA4pmf2rMXQwGcOhNMprFN9YM9pc8Xt5lZg5BLl0vP9dRPZo7uCjZ0EDua2V-2B2CA1Ykw2NxtCMneVw5rBOTHdQzaJvaa-2BlXqNW9etD8Gh4OItrrn1LMD1vodLUw-3D-3DEBSs_7mLGwmUci-2BLaXswv9WX1yTgqn3Wad-2FotHhzHgSNAZbWXt6ukpLDSEZO7JJh2hxIXUKjEx53FMRLvfrTiBIKAsVVUO3JJiG28ssQdPW5owjD5VFaEAO0SwssIVnqcjQqVFxyZC8LikgS6fwVnXxgcYkXJ7iEB1HH8mu7Axq2XASWPoAYAGEFE5oNr94ol-2FCrUt-2Bymgw0nEArEVMEgqJq8BA-3D-3D) (Sep 18), Ueda said "a good example would be what the U.S. and European central banks did. Underlying inflation hasn't exceeded 2 percent yet. And we want to keep it that way. That's why we'd like to act preemptively." Sensible. But "the market didn't think it was that hawkish," and with two dissents on the board, traders quickly concluded the bar for the *next* hike had just gone up.

So the yen fell about 1.2% on the day. NAB's Sally Auld put the contrast beautifully on [NAB Morning Call](http://url7324.matterfact.com/ls/click?upn=u001.idHmPrr2Geh7KYLAsTy7NkrIVb-2FgA4pmf2rMXQwGcOgjjBvvm0HFu7XrihkCqrzYTVYFsWXs0f8VahSZb8nzk9hmJPIC8nV98TNj5QmgSyJ6FEBCXRshyw-2BAUvJPvS-2Bi85Hf6e1AKUg5H7yyg61brQ-3D-3Dpz8x_7mLGwmUci-2BLaXswv9WX1yTgqn3Wad-2FotHhzHgSNAZbWXt6ukpLDSEZO7JJh2hxIXUKjEx53FMRLvfrTiBIKAscwGOEdun3x4P6vsQ3RhxoUPpAvseLHgiOaB2TU530JPpZlfUiSP9RxV-2BsWVXD36SxlfPnhQyRBi7-2FWuxhaZ1-2BZva0IQ8P-2FGsOad08svVB6Px-2FROjUrw3j2Oqf6Wn7KXoA-3D-3D) (Sep 20): the ECB's hike this month was, in Lagarde's words, "a no-brainer," the Fed's was unanimous, and against that backdrop, Ueda's comments "just weren't strong enough or didn't appear to have enough resolve to really convince the market that… real rates need to be not negative anymore in Japan." Her dry summary of the central-banking moment we're in: "it's not that hard to sound hawkish." Japan chose not to.

Why does a quarter-point in Tokyo matter to a book in London or New York? Because, as Eisen reminded her audience, "it's not just a currency story. It's a global liquidity story." For decades, near-zero Japanese rates made the yen the world's cheapest thing to borrow: investors borrowed yen and bought higher-yielding assets everywhere else. That is the "carry trade," and the yen sits underneath it. When Japan's message wobbles, the whole scaffolding of that trade wobbles too.

### 2. Toward 158, and then the warning shots

Here's where it got tense. As London opened on Friday, dollar-yen "pushed… up towards that 158 level," Auld said. Then the yen suddenly rallied back, "as various news sources were reporting that there were some rate checks going on in the dollar-yen market." That is, Japanese officials calling around to banks asking for exchange-rate quotes, which the market reads, in Auld's words, as "a signal that some intervention might be coming."

The levels here are worth committing to memory. On [Saxo Market Call](http://url7324.matterfact.com/ls/click?upn=u001.idHmPrr2Geh7KYLAsTy7NkrIVb-2FgA4pmf2rMXQwGcOisZ6dE4FL9aISid56Yo1LbY-2FSnEaWmauknlKFKtPO02PNGziRqg81jcgVsuHVX4ulcKb7MM5ENB0J-2FbNAlyku2xRZ-2BMhzvqh0UjOZRNPrt1A-3D-3Drh4e_7mLGwmUci-2BLaXswv9WX1yTgqn3Wad-2FotHhzHgSNAZbWXt6ukpLDSEZO7JJh2hxIXUKjEx53FMRLvfrTiBIKAseiR9sbEH1KGT-2FqfoHVbthk61NTOm-2BsBb3r31-2Bfs-2FUgp5rGhp-2Fhcp9MgpxkUbPI9gmSiOxqhbF6tyL-2F-2BO2ws6a-2Fs0bDp6sNTXwvE0o773NSsLh6l5skAjbk1T0K9s6a5AQ-3D-3D) (Sep 18), John Hardy pinned the technical line of defense at the 200-day moving average, "158.42," warning that a close above roughly 158.40 means "the whole 160 situation comes into effect. And you've got this whole existential fight on the Ministry of Finance's hands to get this thing back down again."

But, and this is the uncomfortable part, Japan may not have much ammunition left. J.P. Morgan's Junya Tanase laid out the constraint on [At Any Rate](http://url7324.matterfact.com/ls/click?upn=u001.idHmPrr2Geh7KYLAsTy7NkrIVb-2FgA4pmf2rMXQwGcOgY0cn4hZzX8tqB43X4pXwaKqixhBrwC5Vr56e-2BleB06Zyt92epCPivn5HMirL1AllqOj4gek8klkZmABfvhql0oOB4enI7psjcX5s0PQno8w-3D-3DHCnh_7mLGwmUci-2BLaXswv9WX1yTgqn3Wad-2FotHhzHgSNAZbWXt6ukpLDSEZO7JJh2hxIXUKjEx53FMRLvfrTiBIKAsUUVoSTERCjpRnGkSTZm4M1ErWBl1guwep7iYRxkwb3DVWjzMznrCwSOU5w2NHu5lTlXmaQjhja0bbRbbuAWuyk2FjnfmHhtkVMU8ro-2B8a-2B2ym6LMtqpdWXYSrhZn6VeQQ-3D-3D) (Sep 18): Japan "has already conducted about 17 trillion yen of FX intervention this year, and its FX reserve has fallen by roughly 15%." He wouldn't expect real intervention "unless [dollar-yen] approaches or breaks above the recent high at 164." And the timing is awkward: Japan is on holiday from Monday to Wednesday this week, which means thin, jumpy trading where any threat to intervene "might have more outsized reactions," as Auld noted.

There's a subtler point buried in Tanase's comments that traders should not miss. When the US and Japan intervened together in late July, the US did its buying in *euro-yen, not dollar-yen*, because, Tanase argues, "the top US priority is stability in the US Treasury market, not the [dollar-yen] market." Selling dollars to prop the yen could be read as America tolerating a weaker dollar, which risks Treasury selling. So America's willingness to help defend the yen is real but narrow. Don't assume Washington rides to the rescue at 160.

### 3. Why the yen bulls got run over

Last week this newsletter walked through a genuinely loud bullish-yen consensus. This week those same people are nursing losses, and it's worth being honest about why.

The mechanism is positioning. As Hardy put it, "all this positioning… they got long the yen on the way down. With that huge move, it's really tough with risk-reward. And now everybody's running for cover and getting squeezed out." When a crowded trade meets a disappointing catalyst, the exit is narrow.

But the deeper point is about what Tanase calls the "reaction function," the logic connecting Japanese rate hikes to a stronger yen. For years, more hikes did *not* help the yen, because markets feared the Bank of Japan was hopelessly behind the curve. That changed after July's coordinated intervention: suddenly "rising [Bank of Japan] rate-hike expectations… tended to support [the yen]." Friday's dovish dissent threatens to snap that link back. In Tanase's words, the outcome "could reignite behind-the-curve concern, accompanied by higher risk premium and weaker yen." He now sees "risk still tilted toward a pullback" in the market's aggressive bet on four more Japanese hikes, and a dollar-yen that trades in a *155–165 range*, with Friday's meeting having "reduced the risk of a downside break" and raised the odds of a drift back toward the middle.

Not everyone thinks the bull case is dead, just delayed. Nomura's Tokyo economist actually *brought forward* his hike forecasts after the meeting, to [December and March](http://url7324.matterfact.com/ls/click?upn=u001.idHmPrr2Geh7KYLAsTy7NkrIVb-2FgA4pmf2rMXQwGcOjwUIBt2qmZHHaU6BhTGUOm0E8sQ-2BbPHNykwr34ybuNYvvtNWwKVMJjtgnbT0dZUEBVLhtFVZCyr9azBNvLEG0DZmaXZVOfbWi1-2B4YJ0e-2FnxA-3D-3DLgfp_7mLGwmUci-2BLaXswv9WX1yTgqn3Wad-2FotHhzHgSNAZbWXt6ukpLDSEZO7JJh2hxIXUKjEx53FMRLvfrTiBIKAsb6VRMaR8-2FpO8SeZNpQzFBSuXvj1PfVs0-2BGb5xiUITvu9YROfwjybs1IWdmQWCU3Uco9Lb7JpMKtPeBq8J25MWB9QM9w5wXSrES8-2F5UMvA-2FT6VSNWb7oIfVzUa4ExRi1qg-3D-3D) (Sep 18), citing rising oil and the Fed's clear hawkish stance. And Bloomberg's Paul Jackson made the case that the direction of travel is intact even if the timing slipped: "once the… tide turns, the momentum can move quite quickly… you'd see quite a bit of strengthening in the yen over the coming months." He also made a point that should comfort anyone still long: because the US now has "skin in the game" after intervening, "the idea that the yen is going to go back into the 160s or beyond, I don't think that's going to happen because Scott Besant isn't going to allow it to happen."

There's a genuine hostage situation underneath all this. Japan holds more US Treasuries than any other foreign country. If the yen weakens far enough that Japan has to sell those Treasuries to buy back its own currency, US borrowing costs go up, the last thing the US Treasury wants. That is exactly why Treasury Secretary Scott Besant would rather Japan hike its way to a stronger yen than intervene its way there. As he told CNBC's Eisen back at the G20: "I have information that the market doesn't have. And it's my belief that the Japanese government and that the [Bank of Japan] will do the things that will lead to a stronger yen." Friday was Japan doing a bit of that, just not enough of it.

### 4. The Bank of England did nothing, and it was the dovish surprise of the week

While Japan grabbed the headlines, the Bank of England delivered the more interesting policy twist. On Thursday it *held rates at 3.75%* for a ninth straight month, in a 6-3 vote (the three dissenters, wanting a hike, now include the bank's own chief economist Hugh Pill). That was expected. What wasn't expected came from a corner most people ignore: how the bank manages its enormous pile of government bonds.

For background: the Bank of England has spent years slowly *selling* the bonds it bought after the financial crisis and during COVID, a process that dumps extra supply into the market and pushes up borrowing costs for everyone, the government included. On Thursday it announced it would *stop those sales for six months*, and halt sales of long-dated bonds entirely. As Hardy described it on [Saxo Market Call](http://url7324.matterfact.com/ls/click?upn=u001.idHmPrr2Geh7KYLAsTy7NkrIVb-2FgA4pmf2rMXQwGcOisZ6dE4FL9aISid56Yo1LbY-2FSnEaWmauknlKFKtPO02PNGziRqg81jcgVsuHVX4ulcKb7MM5ENB0J-2FbNAlyku2xRZ-2BMhzvqh0UjOZRNPrt1A-3D-3DTRFW_7mLGwmUci-2BLaXswv9WX1yTgqn3Wad-2FotHhzHgSNAZbWXt6ukpLDSEZO7JJh2hxIXUKjEx53FMRLvfrTiBIKAsd6J-2B1DnQI9HQqJw3LgBtKJjT5eFh5BBPoe94PPGQSnmKcpwEnKtuTsIZ0nxkswZcbn4uCg9svQB1rtFUQzOWzKWQESqlcbXlL9galJMkyyzvFW07GWKzMiiT4REOQgjIA-3D-3D) (Sep 18), the bank essentially said "we're going to stop all sales of gilts for six months." The reaction in long-dated UK bonds was immediate: the 30-year yield fell 12 basis points in a single day, a big move, coming right after those yields hit their highest since the late 1990s.

Why it matters: this is stealth support for the UK bond market, and by extension for the Chancellor, weeks before the autumn budget. J.P. Morgan's Octavia Popescu, on [At Any Rate](http://url7324.matterfact.com/ls/click?upn=u001.idHmPrr2Geh7KYLAsTy7NkrIVb-2FgA4pmf2rMXQwGcOgY0cn4hZzX8tqB43X4pXwaKqixhBrwC5Vr56e-2BleB06Zyt92epCPivn5HMirL1AllqOj4gek8klkZmABfvhql0oOB4enI7psjcX5s0PQno8w-3D-3D2cO8_7mLGwmUci-2BLaXswv9WX1yTgqn3Wad-2FotHhzHgSNAZbWXt6ukpLDSEZO7JJh2hxIXUKjEx53FMRLvfrTiBIKAsbmjPMIgjtfUcL22F705oFH2mT6eWVPCHFaGKScQase3D-2BIo7MBf-2BB9mVhlbb-2FUoAbjE5EBfV1QZbFKNhg5YuAYoM0EiSPeQEgUhF3duj-2BbfjzIV8aPKYi8EcPQgx13QLQ-3D-3D) (Sep 18), flagged an extra wrinkle: the bank floated selling some of its bonds directly to the government's debt office rather than into the open market, a technical change, but one that helped the long-end rally.

For the everyday Briton, the pain is in mortgages, not policy rates. On [This is Money](http://url7324.matterfact.com/ls/click?upn=u001.idHmPrr2Geh7KYLAsTy7NkrIVb-2FgA4pmf2rMXQwGcOiTu67-2BKyBPTxj30RnuAfbBqPZFdoZ6xt-2BJ-2B4KvOsnUJRlz9OcqRpczkiarJiOIOLmeU8s8pHODmgKwCpMez-2Fz2Q38MqJN5U143QZmPTgbXdQ-3D-3DB1WI_7mLGwmUci-2BLaXswv9WX1yTgqn3Wad-2FotHhzHgSNAZbWXt6ukpLDSEZO7JJh2hxIXUKjEx53FMRLvfrTiBIKAsVopAUZdipnMqx17qcGiBiGOcoUNENpEaFKhwHKZC-2BBZnPCqnQQEMuTNAKtAER8-2Fv-2BkMjzlRPu371ysefy6UIFr3Ql8krnN20fba24AFPW-2Br6ezu7BsFjWkQgOmfZotOhA-3D-3D) (Sep 19), the hosts noted the average five-year fixed mortgage is now at its highest since November 2023, with the big five lenders all raising rates and some no longer offering anything below 5%. One vivid example: a borrower rolling off a 0.99% deal was quoted *4.88%*, about *£350 a month* more. Around three-quarters of a million households come off cheap 2021–22 fixes in the next six to nine months, and the domestic energy price cap could jump ~24% in January. The bank expects UK inflation to climb toward 4%, but Governor Andrew Bailey insists there's "very limited evidence of the energy price shock spreading through the economy." Markets aren't so sure: they still price a hike this year and up to four more next year.

### 5. Switzerland and Scandinavia: the funders stay funders

This Thursday brings a cluster of smaller European central banks, and the message from the desks is: don't expect fireworks, and don't expect the pecking order to change.

The *Swiss National Bank* is expected to hold its rate at zero. Nomura's European economist Josie Anderson explained on [The Week Ahead](http://url7324.matterfact.com/ls/click?upn=u001.idHmPrr2Geh7KYLAsTy7NkrIVb-2FgA4pmf2rMXQwGcOjwUIBt2qmZHHaU6BhTGUOm0E8sQ-2BbPHNykwr34ybuNYvvtNWwKVMJjtgnbT0dZUEBVLhtFVZCyr9azBNvLEG0DZmaXZVOfbWi1-2B4YJ0e-2FnxA-3D-3D41Xj_7mLGwmUci-2BLaXswv9WX1yTgqn3Wad-2FotHhzHgSNAZbWXt6ukpLDSEZO7JJh2hxIXUKjEx53FMRLvfrTiBIKAscw467jO-2BLHJuO8umzsAQu8kbnxbYK1lwPbkxeE9bc5-2F-2BwIK7RGLFXHrWPcCvJCRcsQTQqTApM86bAqupajd8ye-2FR9cg0VJX6baSFH65Px9kXzubg-2BYZ0n0H2NrK5EsbbA-3D-3D) (Sep 18) that Switzerland has escaped its own trap: a year ago it faced outright deflation and the prospect of going back to negative rates, but "now with a bit more inflation coming through from energy, inflation figures actually look to be in quite a good place." Swiss inflation is running around 0.8%. The thing to watch, she says, isn't the rate but the language on currency intervention. The bank may soften its wording back to the standard line that it "remains willing to be active in the FX market as necessary," down from a previous "increased willingness to intervene," and the reason is telling: "the franc has depreciated notably over the past six months, which has eased prior deflationary pressures." In other words, a weaker franc has done the Swiss National Bank's job for it.

That leaves the franc where it has been all along: the lowest-yielding major, the market's designated currency to borrow and sell. J.P. Morgan's Popescu was blunt that the Swiss meeting won't "upset Swiss funding," and the desk stays structurally bearish the franc. Sweden's Riksbank and Norway's Norges Bank are also expected to hold on Thursday; the desks keep the Norwegian krone in the "high-yielder to own" bucket and the Swedish krona in the "low-yielder to sell" bucket.

### 6. Europe's fault line hasn't gone away

The euro remains a currency people borrow rather than own. But two slow-burning risks are still glowing.

The first is in the bond market. The gap between what France and Germany pay to borrow for 10 years sits at *98 basis points*, and on [Saxo Market Call](http://url7324.matterfact.com/ls/click?upn=u001.idHmPrr2Geh7KYLAsTy7NkrIVb-2FgA4pmf2rMXQwGcOisZ6dE4FL9aISid56Yo1LbY-2FSnEaWmauknlKFKtPO02PNGziRqg81jcgVsuHVX4ulcKb7MM5ENB0J-2FbNAlyku2xRZ-2BMhzvqh0UjOZRNPrt1A-3D-3Df76h_7mLGwmUci-2BLaXswv9WX1yTgqn3Wad-2FotHhzHgSNAZbWXt6ukpLDSEZO7JJh2hxIXUKjEx53FMRLvfrTiBIKAsTEFbUDsJY2bwf1r7cIQwY8RtoGh0WsupvYMNT0GtodGegkF1MD6ddU3t-2F3w2Ws3t-2BqU7AKhAaQmPay2NGodq3HC1k6Q-2B5TO6Mi-2F2G-2FCt-2FPY-2BMXuzJEyuaSnGeWXJ6rrkg-3D-3D) (Sep 18) Hardy warned that this spread "needs to stop around 100… If it continues much higher… there will be a lot more focus on that and talk of a new EU sovereign debt crisis or at least the need for some kind of official response." That is a level last seriously discussed during the euro crisis of a decade ago.

The second is politics. Germany held state elections this weekend, following an earlier round in which the far-right AfD came close to a majority. Nomura's Anderson noted the pressure this puts on Chancellor Merz: his CDU was polling badly enough that in one state it risked missing the 5% threshold to enter parliament, and "you're seeing increasing headlines of people raising the possibility of a chancellor swap." A snap election looks unlikely (no mainstream party wants to hand the AfD a bigger platform), but the drift rightward across Europe is now a market factor, not just a political one. On Friday, French 10-year yields rose 12 basis points, the biggest mover in European bonds, while German yields barely budged ([NAB](http://url7324.matterfact.com/ls/click?upn=u001.idHmPrr2Geh7KYLAsTy7NkrIVb-2FgA4pmf2rMXQwGcOgjjBvvm0HFu7XrihkCqrzYTVYFsWXs0f8VahSZb8nzk9hmJPIC8nV98TNj5QmgSyJ6FEBCXRshyw-2BAUvJPvS-2Bi85Hf6e1AKUg5H7yyg61brQ-3D-3DiD7T_7mLGwmUci-2BLaXswv9WX1yTgqn3Wad-2FotHhzHgSNAZbWXt6ukpLDSEZO7JJh2hxIXUKjEx53FMRLvfrTiBIKAsf1M-2Fx8A8cC9HIWqCnZ0lPV6-2BqZJu2O3FXKjk-2Bp9rxfxhxMI7HYqcziIAQ2knGeZtuykdgTqanvVDr2sKaetNP2spNEx9jD84GtV4ouaNEkiSiPJiCrPY9213J2fapYdLw-3D-3D), Sep 20).

## The Debate

*Fight 1: Is the yen's rally dead, or just resting?*

The bruised bulls make the "resting" case. Nomura *pulled forward* its Japanese hike forecasts to December and March. Bloomberg's Paul Jackson argues the direction is intact and that the US, having intervened, won't let dollar-yen run back to the 160s. And Tanase's own framework still points to a 155–165 range rather than a full collapse of the yen. So the structural story (Japan normalizing, the carry trade slowly unwinding) is delayed, not cancelled.

The "it's over for now" case is simply what happened: a divided central bank, a soft governor, and a positioning squeeze that has forced the longs out. As Hardy put it, if dollar-yen closes above roughly 158.40, "it looks just darn ugly regardless" for the yen bulls, and you're into an "existential fight" for the Ministry of Finance. The honest read: the medium-term case for a stronger yen survived Friday, but the near-term momentum flipped hard against it, and the next line of defense, official intervention, is both under-funded (reserves down 15%) and awkwardly timed against a holiday week.

*Fight 2: When everyone's hiking, who actually wins?*

Here the desks are refreshingly aligned, and it's the same framework as last week, now reinforced. When every central bank tightens, direction stops mattering and *relative yield* takes over. J.P. Morgan's line on [At Any Rate](http://url7324.matterfact.com/ls/click?upn=u001.idHmPrr2Geh7KYLAsTy7NkrIVb-2FgA4pmf2rMXQwGcOgY0cn4hZzX8tqB43X4pXwaKqixhBrwC5Vr56e-2BleB06Zyt92epCPivn5HMirL1AllqOj4gek8klkZmABfvhql0oOB4enI7psjcX5s0PQno8w-3D-3Dpng2_7mLGwmUci-2BLaXswv9WX1yTgqn3Wad-2FotHhzHgSNAZbWXt6ukpLDSEZO7JJh2hxIXUKjEx53FMRLvfrTiBIKAsZ2jNlSd3azBgiV4eeRmwNofGizILzNNHkcdZgiLGXFEEsfD1qhWpycSnSjWYSd-2FcNRUE1Saottj5cND7XDoCf3yPYGNpmfWo-2B-2BdZzZrOfidhax8SSXdpSlWb5vRaWHTMA-3D-3D) (Sep 18) was "bullish beta, bullish USD reinforced": own the higher-yielders with good growth (the Norwegian krone, and notably sterling), and borrow the low-yielders (the franc, the Swedish krona, and, for now, the yen). Popescu's defense of sterling is the standout contrarian call: "sterling is still a relative high-yielder within G10. And growth has continued to beat expectations," with a "blowout retail sales report across all categories." The one caution came from the same desk: the dollar "doesn't always peak with the first Fed hike," there's a seasonal dollar bid into late September, and "humility is in order" for anyone betting that too much tightening is already priced.

## Trades in Play

Drawn from what the desks actually said, ranked by usefulness for a book:

* *Respect the dollar-yen squeeze, but don't chase it into intervention.* The path of least resistance is higher for dollar-yen after Friday's dovish hike, especially in a thin holiday week, but with rate-checks already underway and J.P. Morgan flagging 164 as the level that would trigger real intervention, this is a trade to size for a violent two-way move, not a one-way grind. The 158.4 technical line is the referee.
* *Stay long sterling against the low-yielders.* J.P. Morgan is sticking with bullish pound versus the Swiss franc and Swedish krona, a relative-yield play backed by UK growth beats. The Bank of England's bond-sale freeze also reduces the "gilt accident" tail risk that has haunted sterling.
* *Borrow the franc.* With the Swiss National Bank content to let a weaker franc do its work and inflation at 0.8%, the franc remains the cleanest funding currency in G10. J.P. Morgan stays structurally bearish it.
* *Euro-yen: the direction may finally be turning, but the entry has gone.* MUFG's desk had a profitable short euro-yen (it fell from 187–188 to around 177) and has now *closed* it, judging the near-term move done; it still expects lower euro-yen in 2027 ([MUFG Global Markets Podcast](http://url7324.matterfact.com/ls/click?upn=u001.idHmPrr2Geh7KYLAsTy7NkrIVb-2FgA4pmf2rMXQwGcOjxG24r3eW0JU4vp6twdFUQgn5g-2BuFqoHHCBCahckfm5aDhFHxQUkLTboxenUmE34zuCB4SuiTgGWPNRQDVMqpvMbJgBkkvcqihnEMH3m4U8A-3D-3DRlTW_7mLGwmUci-2BLaXswv9WX1yTgqn3Wad-2FotHhzHgSNAZbWXt6ukpLDSEZO7JJh2hxIXUKjEx53FMRLvfrTiBIKAsUIUZnbWY-2BhKgFuNB8W3RmzOZpTkTuT8AbrsonRXEMLvdk7XkVvkrvt6GIbPpOQWXP-2FwGZcmA9vu9utgGbjJgM4lJJAcwRremGZqrBjg3GQDKFa0QxkUpdtGiYosXYnKWw-3D-3D), Sep 18). European companies waiting to buy euro-yen near 160 "don't think we're going to get that opportunity again" in the short term.
* *Own the high-yield carry, funded by yen and franc.* The Norwegian krone stays a favored high-yielder; sterling sits near the top of J.P. Morgan's model. The funders are the franc, the krona and, freshly, the yen.

## Read-Throughs

* *Euro-yen and euro-franc.* Euro-yen is the cleaner expression of the "stronger yen eventually" view than dollar-yen, because it sidesteps the dollar's post-Fed tailwind, but MUFG's decision to bank its short tells you the easy money there has been made for now. On the franc: a franc that has weakened over six months is good news for the likes of Nestlé, Roche and Swatch, and it takes the pressure off any euro-franc floor.
* *Bonds are the tell.* Long-dated UK gilts rallied hard on the Bank of England's sale freeze (30-year yield down 12bp), even as US 10-year yields climbed back to 5.0% and the France-Germany spread hovers at 98bp. Watch that French-German gap: a sustained push through 100 is the signal that Europe's political noise is becoming a market problem.
* *The Nikkei liked it.* A weaker yen sent Japanese stocks up 1.4% on Friday even as European bourses fell (the DAX down 1.6%, the FTSE down 1.5%). That is the mechanical read-through: a soft yen is a tailwind for Japan's exporters and the Nikkei, and a headwind for yen-funded carry baskets if volatility spikes.
* *Gold and the calm.* With market volatility contained despite all the central-bank drama, gold pushed on 4,400 and Saxo's Hardy sees 4,500–5,000 in view if it can break higher, a reminder that the macro hedge is bid even when equities are steady. The wildcard on the calendar: the confirmed *Trump-Xi summit at the White House on Sep 24*, with a notably stronger Chinese renminbi going in.

## What Changed

One thing changed, and it changed the whole picture: the event everyone was waiting for finally happened, and it went the *other* way. The Bank of Japan raised rates to a 31-year high, and instead of the yen surging, as the marquee trade of the last month assumed, it fell, because a split vote and a cautious governor told markets Japan isn't as committed to tightening as the Fed or the ECB. The yen bulls who dominated last week's issue spent this week getting squeezed out of their trades.

The through-line from last week is intact but its punchline has inverted. It is still a synchronized, oil-driven global hiking wave: Fed, ECB and Bank of Japan all tightened in the same month for the first time ever. The currencies that win are still the higher-yielders with clean balance sheets, and the funders (franc, krona, and now the yen again) still lose. What flipped is Japan: last week it was the market's favorite long, and this week it's back to being a funding currency with an anxious Ministry of Finance watching 158 and a holiday week to survive. The next real test isn't a rate meeting. It's whether Japan actually intervenes, and whether anyone in Washington helps.

---

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