Key Highlights: 

  • Both central banks paused, but from opposite directions 
  • Japan is normalising upward; the US is paused mid-cut-cycle 
  • This asymmetry, not the pause itself, is what is moving the yen 
  • The IMF projects two more BOJ rate hikes in 2026 and one in 2027, which would meaningfully narrow the US-Japan rate gap 
  • Watch for a BOJ hike to 1% by mid-2026 as the single most important trigger for a larger yen move 
  • If that comes alongside sticky US inflation, the rate differential could narrow faster than current pricing implies 

 

A Tale of Two Pauses 

The Bank of Japan and the Federal Reserve both paused this month. That is where the convergence stops. 

The Japanese yen edged higher against the US dollar this week after both the Bank of Japan (BOJ) and the Federal Reserve held rates steady. But the shared headline masks a fundamental divide in direction: Japan is slowly tightening, while the US is reluctantly on hold after a cycle of cuts. 

Understanding that distinction is essential for reading where currencies, capital flows, and inflation go from here. 

 

Two Pauses, Two Very Different Stories 

The BOJ kept its policy rate at 0.75% in January, though the decision was not unanimous. Board member Hajime Takata dissented, pushing for a hike to 1%, a signal that tightening remains firmly on the table. For a central bank that spent decades in negative-rate territory, this is a significant shift. 

The Fed, meanwhile, held the federal funds rate at 3.5% to 3.75% at its March 18 meeting. Crucially, this follows three consecutive 25-basis-point cuts in late 2025, not hikes. The Fed is pausing a loosening cycle, not a tightening one. Persistent inflation and fresh geopolitical risk have closed the door on further easing, at least for now. 

The result: two central banks on pause, but moving toward each other from opposite directions. 

 

Why the Yen Is Strengthening 

The yen's appreciation is not about current rate levels. Japan's rates remain far below the US. It is about expectations. 

Markets are pricing in a meaningful probability of further BOJ hikes this year, with the IMF projecting two additional increases in 2026 and one more in 2027. As that gap between US and Japanese rates narrows, two things happen: 

  1. Carry trades unwind. Investors who borrowed cheaply in yen to fund higher-yield positions elsewhere begin closing those trades, buying back yen in the process. 
  1. Forward-looking capital rotates. Institutional money moves ahead of rate changes, not after them. 

The yen's upside is still limited by wide existing rate differentials, but the trend is no longer one-sided. 

 

Energy Prices: The Wild Card 

Both central banks are navigating a familiar problem: supply-side inflation they cannot directly control. 

Rising oil prices, driven by escalating conflict in the Middle East, are feeding back into headline inflation globally. For the US, this complicates the disinflation process and reduces the Fed's flexibility to cut. For Japan, the impact is sharper. As a major energy importer, higher oil prices widen the trade deficit, weaken the yen structurally, and push up consumer prices, all while wage growth continues to lag. 

This is the core policy tension of 2026. Traditional monetary tools are well-suited to demand-driven inflation. They are far less effective when prices are being pushed up by a supply shock thousands of miles away. 

 

What Markets Are Watching 

Three variables will determine how this plays out over the next two to three quarters: 

  • BOJ timing: A rate hike to 1%, likely by mid-2026, would accelerate yen appreciation and sharpen carry-trade unwinding. 
  • Fed flexibility: If US inflation reaccelerates on energy, the cuts markets were pricing for late 2026 get pushed out, keeping the dollar firm. 
  • Oil: A de-escalation in the Middle East would ease imported inflation pressures for Japan and potentially revive Fed cut expectations simultaneously. 

Until these resolve, volatility across currency and bond markets is likely to remain elevated. Capital flows are becoming shorter in duration and more tactical, reflecting uncertainty, not conviction. 

 

The Bottom Line 

The narrative of "synchronised pauses" is superficially true but analytically misleading. Japan is normalising from near-zero rates for the first time in a generation. The US is holding after a cutting cycle, hemmed in by inflation that will not fully cooperate. 

The yen's modest gains reflect this asymmetry. A sustained trend requires the BOJ to follow through on its tightening signals and the Fed to remain on hold longer than markets currently expect. 

Neither outcome is guaranteed. But the direction of travel, for now, favours the yen. 

 

FAQs 

Why did the yen strengthen if the BOJ did not raise rates?  

The appreciation reflects changing expectations, not current policy. Markets are pricing in a higher probability of future BOJ tightening, which supports the yen ahead of any actual hike. 

Why is the US dollar stable despite global uncertainty?  

The dollar remains supported by relatively higher US interest rates, safe-haven demand, and institutional confidence in the Federal Reserve. However, the absence of new tightening signals limits further upside. 

What is the carry trade and why does it matter? 

 The carry trade involves borrowing in low-yield currencies like the yen and investing in higher-yield assets. If Japan raises rates, this strategy becomes less attractive, prompting investors to unwind positions and buy back yen, pushing its value up. 

How do energy prices affect the yen specifically?  

Japan imports nearly all of its energy. When oil prices rise, import costs surge, the trade balance weakens, and downward pressure on the yen increases. This makes inflation in Japan partly structural and harder for the BOJ to address through rate policy alone. 

What is the biggest risk to this outlook?  

A policy misstep by either central bank, either the BOJ tightening too aggressively into an energy-driven slowdown, or the Fed cutting prematurely, could trigger sharp and disorderly currency moves.