Key Takeaways:
The dollar's rally against the yen has room to extend toward 170-180 as a hawkish Federal Reserve and resilient US economy widen the policy gap with Japan.
The US Dollar Index rose to a 13-month high of 101.8 in late June, up 5 percent from late January, after the Federal Reserve held its policy rate at 3.50 percent to 3.75 percent at the June 17 meeting and released a dot plot that signaled fewer rate cuts than markets had priced. The move marks a sharp reversal from the first half of 2025, when the dollar recorded its weakest first-half performance in more than 50 years.
"We think this is mostly a Fed story," said Muhammad Hamza Saleem, currency research analyst at Morningstar. "The new dot plot came out clearly hawkish. Markets repriced toward a higher-for-longer rate, and that is what we think mainly carried the DXY Index to a 13-month high."
The divergence between the Fed and the Bank of Japan is the primary transmission mechanism. The BOJ has maintained its ultra-loose policy stance, including negative short-term rates and yield curve control, while the Fed has kept rates elevated. USD/JPY traded near 151.80 this week, approaching the 152 threshold that triggered Japanese intervention in October 2022, when authorities spent a record 11.7 trillion yen ($73 billion) supporting the currency. Japan previously intervened at the 145 level in September 2022.
Rate Differentials Widen as BOJ Holds Steady
Market expectations for rate hikes outside the US have been scaled back in response to lower energy prices, according to MUFG senior currency analyst Lee Hardman. "The divergence in policy expectations between the Fed and other major central banks has resulted in yield spreads moving in favor of a stronger US dollar," he said.
Robert Waldner, chief strategist and head of macro research at Invesco Fixed Income, expects the dollar to continue appreciating over the near to medium term. "With oil back to its pre-Iran conflict levels, and non-US economies weaker than the US, nondollar interest rate markets still have room to compress their pricing of rate hikes, which should push USD rates higher relative to foreign rates," he said. Peter Kinsella, head of investment services UK at Union Bancaire Privée, said dollar gains should become more pronounced against G10 currencies with lower yields by year-end.
Not all analysts share the bullish view. Hardman said the dollar's recent strength will not prove maintainable, arguing that the Fed will leave rates on hold as US inflation slows driven by lower energy prices and the fading impact from last year's tariff hikes. He expects growth to pick up outside the US, particularly in Asia and Europe, as the energy price shock fades.
Morningstar's valuation framework suggests the dollar is overextended. "Our currency valuation model suggests that DXY is about 15 percent overvalued," Saleem said. "We think a lot of the current strength is cyclical, rate differentials, and a bit of risk premium rather than a genuine move in fair value. We would look for limited upside from here and a slow drift back toward fair value."
A sustained USD/JPY move toward 170-180 would have significant macro implications. It would strengthen the dollar across other pairs, pressure emerging market currencies, and potentially impact Japanese export competitiveness. The BOJ's next policy meeting will be closely watched for any signals of a shift in its yield curve control framework, which could provide support for the yen. The Fed's next decision is scheduled for late July, with CME FedWatch data showing markets pricing a 62 percent probability of a hold.
This article is for informational purposes only and does not constitute investment advice.
