The US Is Replicating Japan's Yen Trap — And Wall Street Is Already Pricing It In
A Brookings economist is warning that US Treasury buybacks risk dragging the dollar into a yen-style devaluation spiral — an argument largely ignored by English-language markets even as dollar shorts and gold prices surge.
The Warning Nobody in New York Is Talking About
Robin Brooks has spent his career studying the exact pathology he is now diagnosing in America.
The senior fellow at the Brookings Institution and former chief economist at the Institute of International Finance laid out his argument on Substack over the weekend: the US Treasury Department’s expanding bond-buyback program is not a stabilizing force. It is a slow match being struck near a gasoline tank.
Brooks draws a direct line from Washington to Tokyo. He argues that artificial suppression of long-term Treasury yields — in the face of a structural fiscal deficit projected at roughly $2 trillion this fiscal year — will force the market to demand its risk premium somewhere else. That somewhere is the dollar.
Once the currency begins to slide, the mechanics of defense become nearly impossible. That, he says, is the script Japan followed with the yen over roughly two decades.
The analysis is not new in academic circles. But it is remarkably absent from the daily desk notes at most English-language financial outlets, even as the markets start moving in precisely the direction Brooks warns about.
What the Data Actually Says
The context matters. US 30-year Treasury yields recently touched their highest level in two decades. The Treasury Department, under Secretary Scott Bessent, responded by signaling a willingness to step in with buybacks to steady the market. Yields pulled back slightly, then reversed course and climbed again — a telltale sign that investors are not yet convinced the intervention will hold.
Brooks called the buyback strategy “financial engineering” and said it treats the symptom while leaving the disease untouched. The disease, in this framing, is a fiscal trajectory that the market will eventually refuse to finance at artificially low rates.
His comparison to Japan is specific. The yen entered a prolonged depreciation cycle that began when structural fiscal imbalances made it unsustainable to keep real rates low without massive currency intervention. Each attempt to prop up the currency simply reinforced the expectation of further debasement, creating a self-fulfilling spiral. The Bank of Japan’s eventual policy missteps accelerated rather than prevented the collapse.
Brooks is not saying the dollar will follow the yen identically. He is saying the mechanism is identical: when a government refuses to address fiscal imbalance and instead tries to manipulate the yield curve, the market relocates its punishment to the exchange rate.
Markets Already Are
While English-language commentary has been largely defensive — describing the Treasury buybacks as a “management signal” rather than a structural fix — the trades are telling a different story.
Dollar short positions are resurfacing on Wall Street desks. Gold and other precious metals are rallying sharply. These are not signals of a crisis in progress; they are signals of a crisis being priced in by institutional investors who have seen this movie before.
Jonas Goltermann, chief market economist at Capital Economics, pushed back against the worst-case scenario in Fortune commentary. He argued that US economic fundamentals remain strong enough to prevent a sudden dollar collapse. But his qualification was notable: he said the dollar’s rebound capacity would be constrained if unconventional monetary and fiscal policy continues at the current pace.
In other words, the bear case is not that the dollar breaks tomorrow. It is that the dollar loses ground over years, slowly and then all at once.
Lawrence Gilliam, chief fixed-income strategist at LPL Financial, framed the recent yield spike as a normalization from the zero-interest-rate era rather than a breakdown. He described the Treasury buybacks as a credible signal that policymakers intend to prevent an orderly market from becoming an orderly disaster.
Gilliam is probably right about the near term. Brooks is probably right about the medium term. The two views are not mutually exclusive — they describe different legs of the same cycle.
Why This Matters Beyond the Dollar
The yen’s decline was not just a Japanese problem. It exported deflation across Asia, destabilized commodity-importing emerging markets, and forced central banks from Seoul to Mumbai into reactive policy shifts.
If the dollar enters a comparable depreciation phase, the spillover is magnified because the dollar is the world’s reserve currency, not merely a regional one.
Emerging-market sovereigns with dollar-denominated debt face a double squeeze: weaker dollars typically mean stronger emerging-market currencies in normal cycles, but a dollar slide driven by loss of faith in US fiscal discipline is qualitatively different. It signals that the anchor of global financial stability is loosening, which raises risk premiums globally — including on emerging-market borrowing.
Commodity prices, already elevated on gold, could extend further. Central banks that have been accumulating reserves will face portfolio repricing. And any country that has been hedging against a strong dollar may find itself uncomfortably exposed on the other side.
The Real Question
Brooks’ argument rests on a premise that is difficult to verify in real time: that the market will eventually refuse to absorb US debt at rates that do not reflect the underlying fiscal risk.
Right now, the market is absorbing it. Demand remains adequate. Foreign official buyers, particularly from Asia, continue to hold large Treasury positions. The yen comparison, for all its analytical elegance, assumes a parallel in investor behavior that has not yet materialized.
But the comparison also assumes something else — that once the market decides the fiscal trajectory is unsustainable, the reversal is fast and merciless. That is the pattern Japan showed. That is the pattern every currency crisis in emerging markets shows. The question is not whether the mechanism is sound. The question is whether the US market will reach the same inflection point before its policy options are exhausted.
The Brookings warning deserves more attention than it is getting. Not because it predicts a crash. Because it identifies a path that leads somewhere dangerous, and because the trades already being placed suggest that a significant subset of institutional investors have already started walking it.