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The story
On the afternoon of September 3, 2026, the USD/JPY exchange rate rapidly strengthened from the 157 range to the 153 range within a matter of hours, prompting a breaking-news thread on 5ch’s “Nandemo Jikkyo G” (Live News general) board. The rumored triggers were speculation about a further Bank of Japan rate hike and reports that U.S. Treasury Secretary Bessent had urged Japan to raise rates. In the thread, users debated whether currency intervention had actually occurred, the reality of the “FIMA” framework that allows fundraising without selling U.S. Treasuries, and the impact on NISA (Japan’s tax-free investment accounts) and foreign-currency assets — with opinions split over whether the yen would strengthen further or revert to its previous level.
What people said
Got told off — Bessent said to hike rates and told the government to stop interfering with the BOJ.
Guess playing it straight beats intervention gimmicks after all.
Lol there wasn't even a policy rate meeting yesterday or today — and you're just taking that at face value?
I want to buy into my NISA cheap.
Being able to buy more cheaply later just means you overpaid earlier, no?
With regular investing you actually want the price to keep climbing overall.
You don't need to worry about that so much —
Japan has a huge revenue base that can offset it to some degree.
The real problem is the shinkin banks (regional credit unions) and the local economy —
they had no decent borrowers to lend to, so they bought bonds and just sat on them.
It's already being priced in, that's why the yen's strengthening, right?
Nah, if that logic held, the Fed's rate hike should've already been priced in and pushed the dollar up too — but it hasn't.
Japan's rate hike just has a bigger impact, I guess?
The jobs report (nonfarm payrolls) came out last night and came in a bit worse than expected, so the vibe was already "the US probably won't hike."
Then throw in a Japan rate hike and the whole picture changes.
The timing on this one was almost too perfect, wasn't it?
I mean, the report that Bessent chewed Japan out only came out yesterday.
Everything's lining up way too neatly.
Feels like there was a script for this.
I went and bought on leverage though
Wait, why would you do that when it's about to drop…
Demand or no demand, when the hyperscalers' debt load has ballooned this much, it hits their funding costs directly.
If the data center buildouts or physical-AI rollouts they've got planned slip even a little from schedule, this whole thing crashes and unwinds fast.
Their free cash flow is already blown out.
No way, lol.
That's some seriously convenient thinking.
Must be nice being that happy.
The US at least has a visible endpoint for its rate hikes.
No telling how far Japan's gonna go.
Has to have been intervention — but was it Japan alone, or joint US-Japan?
Since the US would get mad, right now they're borrowing from the Fed instead of selling Treasuries to fund the intervention.
That's messed up.
Japan holds more US Treasuries than any other country — why can't it sell them when the yen's weak?
There's no upside to buying US Treasuries for them if that's the deal.
Re: #53
If you mean FIMA, that was only floated as a possible option during the last joint US-Japan intervention — it hasn't actually been used yet.
It was just a warning shot at the market: "this is available if we need it."
And part of the point of using FIMA is to avoid taking a loss on the face value of the Treasuries.
Even with FX gains on the table, holding to maturity looks better for Japan right now once you factor in the coupon.
It wouldn't even hurt the P&L.
And besides, Japan did actually sell Treasuries for this year's intervention —
something like ¥1.7 billion worth of T-bills.
If things stay as they are, nothing changes, but if they actually hike, that changes things.
And if the US cuts, even more so.
Wasn't it reported that they'd used that already?
I figured Japan couldn't sell any US Treasuries at all anymore.
Everyone else in the world is stockpiling gold, and Japan's just going down with the US Treasury ship.
Though gold's probably got a good chance of being contaminated with fake tungsten bars too, thanks to a certain country.
They went in easy, blowing ¥10 trillion right out of the gate on the very first solo intervention.
That wasn't enough, so they used another ¥7 trillion, and then the US joined in too, turning it into a joint intervention.
Then Bessent and Katayama jointly announced "the FIMA framework is on the table next time, so be warned," and all the short-term players squared their positions.
Macro players are probably going to start moving their positions too now, which should add momentum.
By the way, South Korea also intervened the same day, selling dollars and buying won.
Nonstop all the way to 130.
If we're heading back to DPJ-era (Democratic Party of Japan, 2009-2012) ¥80-to-the-dollar levels, you're locking in losses for sure.
Unless ¥80 is actually locked in, you might as well just keep buying more with dollar-cost averaging.
No, seriously, we could be heading back to DPJ-era levels from here.
Could break below ¥100 by year-end.
An unprecedented crash, no joke.
If other countries were cutting rates while Japan hikes, maybe, but everyone's dealing with inflation, so it won't go that far.
Sure, anything's possible in the future, but before it gets that bad, Bessent will blow a gasket again, so it probably won't happen.
If you don't, who cares if the yen moves like 2 or 3 yen stronger?
It's about to move another 30 yen from here, so it's actually a pretty big deal.
They're gonna die 😭
What am I supposed to do about that?
You've been raking it in this whole time the yen was weak, so call it a "happy tax."
Right now it's marked at 153.
Background and Key Points of the Discussion
The trigger for this day’s sudden USD/JPY move is believed to be a combination of speculation about a further Bank of Japan rate hike and reports that U.S. Treasury Secretary Bessent had told Japan not to hesitate on raising rates. The thread also touched on the “FIMA Repo Facility,” a mechanism that lets Japan borrow from the U.S. Federal Reserve to fund currency intervention without selling U.S. Treasuries — a framework whose operational guidelines were laid out during a past joint US-Japan intervention, and which is mentioned here as a way for Japan to secure intervention funds without taking a face-value loss on its Treasury holdings. That said, market participants themselves are divided on whether this move was actually driven by intervention or by interest-rate-differential speculation, and details discussed in the thread — such as intervention amounts of “¥10 trillion” or “¥7 trillion,” or claims about counterfeit material mixed into gold bars — remain unverified speculation and hearsay from an anonymous message board. Voices worried about the impact on NISA accounts, foreign-currency assets, and leveraged trading crossed paths with each other, and opinion was split over whether the yen’s earlier weakness would resume or reverse for good.
*This article is excerpted and summarized from the 5ch (Nandemo Jikkyo G) thread “[Breaking] USD/JPY at 157.26 yen wwwwwwwwwwwwwwww.”
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