Last week, the Federal Reserve ran a facility that lent foreign central banks exactly nothing -- and has done so for eight weeks running. So it was a strange moment for the Treasury Secretary to go on television and suggest that the cap on that idle window be raised. Whatever was worrying him, it was not a shortage of dollars.
The facility, a repo line for foreign central banks, lends dollars against their U.S. Treasuries. And the timing was not random. Washington and Tokyo had just moved to prop up a sliding yen, and the Secretary was urging the Fed to enlarge the window Japan could reach for next time.
The Fed created the facility in the scramble of 2020, when the world was starved for dollars and dumping Treasuries to raise them. In a genuine dollar crunch, like 2008 or 2020, dollar swap and repo lines are exactly what the Fed should provide.
This is no emergency.
The usual worry is that leaning on the Fed bends its independence. The real problem is simpler: a currency defense is supposed to face a financial limit, and routing it through the Fed is how you make that limit easier to evade.
A backstop with nothing to back
The idleness is the tell. The facility was built for a broad dollar shortage, and there is no sign of one. Japan holds more than a trillion dollars in Treasuries, more than any other foreign government, and funding markets are calm.
That is not a country short of dollar collateral. Japan wants dollars to sell -- to push its own currency higher. Those dollars are real liquidity, but liquidity spent to move an exchange rate is not liquidity easing a panic.
It is ammunition.
Not a loan to survive, but a stake to spend
There is a real argument on the other side. A fire sale of Treasuries by the world's largest foreign holder could rattle the very market the Fed is charged with keeping orderly. Letting Japan borrow against its bonds rather than dump them could prevent that.
That is a legitimate Fed concern.
But it is a narrow one. It justifies a backstop against a forced liquidation; it does not, by itself, justify enlarging a standing facility so an ally can defend its currency longer.
If the current cap were too small to prevent a disorderly Treasury sale, Treasury could make that case, and the Fed could size a backstop accordingly. But that is not the case being made.
What is left is exchange-rate policy. And exchange-rate policy has an owner.
Not the Fed.
The Fed's desk executes these operations as Treasury's agent, but setting the objective -- and bearing its cost -- belong to Treasury. Congress gave the Treasury a tool for exactly that: the Exchange Stabilization Fund, under the Secretary's own control.
Washington just used it, buying yen in the first joint operation to prop up the currency since 1998.
The Fund is finite. The Fed isn't.
The accountable way just ran through Treasury's own account. So why route the next round through the central bank?
Because a currency defense burns dollars, and Tokyo cannot print them.
In the normal course, every dollar sold is one less dollar in the reserve pile. That drawdown imposes discipline. As the pile falls, someone must decide whether the defense is still worth the cost -- or stop.
That is how a bet against the market gets called off before it grows ruinous.
Raising the Fed's cap offers Japan a way around that financial limit. Instead of selling Treasuries or spending reserves that everyone can see, Japan could borrow fresh dollars against those Treasuries from the Fed and keep rolling the loan.
No reserve pile falls. No obvious line is crossed. And the decision to stop becomes easier to defer.
Through that side door, the bet runs on, its wisdom never argued in daylight.
That is what the request really asks: for the Fed to become the balance-sheet financier of an ally's currency policy.
The loan would be well secured. Credit risk was never the concern.
The concern is the discipline the arrangement dissolves.
If defending the yen is worth more than Japan's reserves or the Treasury's own fund can supply, that case belongs in the open -- debated, funded, and owned by the officials responsible for it, not quietly financed through a Fed repo line built for emergencies.
The Fed has one defense against being drafted into work that isn't its own:
The word no.
The job has an owner.
The Fed should leave it there.
