A decade or longer of repatriation could reshape global markets
For decades, Japan's ultra-low interest rates have quietly funded a vast global carry trade, sending trillions of yen into foreign markets in search of higher returns. Now, with the yen approaching a psychologically significant threshold of 150 to the dollar, the Bank of Japan may be forced to abandon its long-held isolation from global monetary tightening — a move that could set in motion one of the most consequential reversals of capital flow in modern financial history. JP Morgan's fixed income chief warns that a decade or more of repatriation could follow, reshaping global markets in ways that are difficult to predict and harder still to contain.
- The yen has weakened more than 11 percent against the dollar in 2023, hovering near 148 — dangerously close to the 150 level that could force the BOJ's hand.
- JP Morgan's Bob Michele warns that a BOJ rate hike could unwind trillions of dollars in yen carry trades, sending shockwaves through global asset markets.
- BOJ Governor Kazuo Ueda signaled in early September that the central bank could end negative interest rates by year's end, prompting economists to dramatically revise their tightening timelines.
- Japan's core inflation has exceeded the BOJ's 2 percent target for 17 consecutive months, yet officials remain unconvinced the trend is durable enough to justify sustained tightening.
- A decade-long repatriation of Japanese capital — the world's third-largest economy — could redraw global capital flows and introduce prolonged volatility across bond and currency markets.
The Bank of Japan stands apart from every other major central bank, still holding to ultra-loose monetary policy while the rest of the world has spent the past two years raising rates to fight inflation. That solitude is beginning to carry a cost.
Bob Michele, who oversees fixed income at JP Morgan Asset Management, believes the BOJ's moment of reckoning is near. With the yen trading around 148 per dollar in late September — down more than 11 percent on the year — the 150 threshold is no longer a distant warning sign. If the currency breaks through it, the central bank will face a stark choice: raise rates or allow further depreciation to import even more inflation into an already pressured economy.
The stakes extend far beyond Japan's borders. For decades, the country's near-zero interest rates made the yen the world's favorite carry trade currency — cheap to borrow, easy to deploy into higher-yielding assets abroad. Trillions of dollars have left Japan through this mechanism. A rate hike would reverse the incentive structure entirely, drawing that capital home. Michele told CNBC he fears this repatriation could unfold over a decade or more, generating waves of volatility as enormous sums reverse course across global markets.
The timeline may be accelerating. BOJ Governor Kazuo Ueda suggested in early September that the bank could have sufficient data by year's end to decide on ending negative rates, sending economists scrambling to revise forecasts. Many now expect tightening to begin in the first half of 2024. Officials have long insisted they need to see wage-driven, sustainable inflation before acting — core inflation has exceeded their 2 percent target for 17 straight months, yet conviction remains elusive.
The BOJ has already begun moving. In July, it widened the band on its yield curve control policy, allowing 10-year government bond yields to rise toward 1 percent — the first policy shift under Ueda. More changes appear likely. Whether the central bank can navigate this transition without triggering the very disruption it has spent years trying to avoid remains the defining question for global capital markets in the years ahead.
The Bank of Japan remains stubbornly alone among the world's major central banks, still clinging to ultra-loose monetary policy while everyone else has been raising rates to fight inflation. That isolation is about to become a problem—and possibly an expensive one.
According to Bob Michele, who oversees fixed income investing for JP Morgan Asset Management, the BOJ could soon have its hand forced. If the yen weakens past 150 to the dollar, the central bank will face a choice it has been avoiding: raise rates or watch currency depreciation import more inflation into an economy already struggling with price pressures. The yen was trading around 148 per dollar in late September, having weakened more than 11 percent against the greenback over the course of the year. That 150 level is no longer theoretical. It is close.
What makes this moment consequential is what happens next. For decades, Japan's rock-bottom interest rates have made the yen the preferred currency for what traders call the carry trade—borrowing cheaply in yen and investing the proceeds in higher-yielding assets elsewhere in the world. Trillions of dollars have flowed out of Japan on the back of this trade. If the BOJ raises rates, that entire arrangement unwinds. Japanese investors and institutions will have less incentive to keep their money abroad. They will bring it home.
Michele told CNBC that this repatriation could unfold over a decade or longer, creating waves of volatility as massive amounts of capital reverse course. "I worry as the yield curve normalizes and rates go up, you could see a decade—or longer—of repatriation," he said. "This is the one risk I worry about." The concern is not academic. Japan is the world's third-largest economy. Capital flows of this magnitude reshape markets.
The BOJ's hand may be forced sooner than many expected. In early September, Governor Kazuo Ueda told a Japanese newspaper that the central bank could have enough data by year's end to decide when to end negative interest rates. That comment sent economists scrambling to revise their forecasts. Many now expect tightening to begin in the first half of 2024, months earlier than previously anticipated. The central bank has been cautious, citing a lack of truly sustainable inflation—the kind driven by wage growth that would support household spending and economic expansion. Core inflation has exceeded the BOJ's 2 percent target for 17 consecutive months, yet officials remain unconvinced it will last.
But the yen's weakness is changing the calculus. A weaker currency makes Japanese exports cheaper, which sounds good for manufacturers. It also makes imports more expensive, which is the last thing an economy needs when inflation is already sticky. The BOJ could use rate hikes as cover—a way to tighten policy while claiming the real goal is currency stabilization and inflation control, not economic restraint. "So, it may give them cover to start hiking rates sooner than the market's expecting," Michele said.
The BOJ has already begun to shift. In July, it loosened its yield curve control policy, widening the band for 10-year government bond yields from zero to 1 percent. That was the first policy change under Ueda since he took office in April. More changes are likely coming. The question is whether the central bank can manage the transition without triggering the very market disruption that Michele warns about. If Japanese capital begins flowing home in earnest, the global financial system will feel it.
Notable Quotes
I worry as the yield curve normalizes and rates go up, you could see a decade—or longer—of repatriation. This is the one risk I worry about.— Bob Michele, JP Morgan Asset Management
When the yen reaches 150 and higher, the BOJ will have to consider that currency weakness is importing more inflation than desired, potentially giving them cover to raise rates sooner than expected.— Bob Michele, JP Morgan Asset Management
The Hearth Conversation Another angle on the story
Why does it matter if Japanese money comes home? Isn't that just a normal rebalancing?
It's the scale and speed that matters. We're talking about trillions of dollars that have been parked in foreign markets for decades because Japan's rates were so low. If that reverses all at once, or even over a few years, you're moving enormous sums of capital. That creates volatility everywhere those funds were invested.
But the BOJ is just raising rates like every other central bank. Why is this different?
Because Japan waited so long. Every other major central bank started hiking in 2022. Japan is still in negative rates. That means the carry trade has had years to grow massive. When it unwinds, it's not a small adjustment—it's a structural shift in global capital flows.
What does 150 yen to the dollar actually mean for ordinary people?
For Japanese people, it means imports cost more—food, energy, raw materials. For the BOJ, it's a signal that the currency is weakening too fast and inflation is being imported. That gives them political cover to raise rates, which they've been reluctant to do.
So the BOJ is trapped?
Not trapped, exactly. But constrained. They want to keep rates low to support growth, but the weak yen is forcing their hand. Rate hikes will help the currency, but they'll also slow the economy. There's no painless way out.
How long does Michele think this repatriation will take?
A decade or longer. That's not a crisis moment—it's a slow reshaping of where capital sits globally. But slow doesn't mean painless. It means years of adjustments in bond markets, currency markets, equity markets.
What are investors supposed to do with this information?
Watch the yen. If it breaks 150, the BOJ will almost certainly move faster on rates. That's the trigger. Everything else flows from there.