FX.co ★ USD/JPY

The USD/JPY exchange rate navigated a volatile environment on Friday, settling around the **154.90** level as a 0.13% daily decline highlighted a growing "policy paradox" between Washington and Tokyo. In Japan, the narrative has shifted toward a notable cooling of inflationary heat; the national Consumer Price Index (CPI) plummeted to **1.5%** year-on-year in January, a sharp descent from the 2.1% recorded in December and the slowest expansion since early 2022. This deceleration was mirrored in the core CPI (excluding fresh food), which hit the Bank of Japan’s (BoJ) 2.0% target exactly, down from 2.4%. While this cooling initially suggests the BoJ might pause its monetary normalization, analysts at Société Générale argue that the "core-core" inflation—which excludes both food and energy—remains stubbornly elevated at **2.6%**. They highlight that much of the recent slowdown is "manufactured" by government utility subsidies and fuel tax cuts, whereas the service sector saw its most active price revisions since 2021 this January. This suggests that "sticky" underlying inflation may still provide the BoJ with the cover it needs to pursue gradual rate hikes later in the spring, potentially as early as the April policy review. Across the Pacific, the U.S. dollar faced a "triple threat" of legal, growth, and sentiment headwinds. The greenback’s primary anchor was loosened by a landmark U.S. Supreme Court ruling that struck down the Trump administration’s use of the International Emergency Economic Powers Act (IEEPA) to levy broad national security tariffs. By declaring these specific tariffs unconstitutional without explicit congressional approval, the court injected a massive dose of trade policy uncertainty into the market. While President Trump immediately responded by signing an executive order for a blanket **10% global tariff** under alternative legal authorities, the dollar remained defensive as investors weighed the risk of retaliatory measures from major trading partners. This legal drama compounded a disappointing "advance estimate" for Q4 GDP, which revealed the U.S. economy grew at a lackluster annualized rate of **1.4%**—a steep fall from the 4.4% seen in Q3. Economists largely attributed this 1.0 percentage point drag to the historic October-November government shutdown, which paralyzed federal spending and exports. The darkening American macro picture was further validated by the final February reading of the University of Michigan Consumer Confidence Index. Sentiment stagnated at **56.6**, missing the preliminary estimate of 57.3 and remaining entrenched in the bottom 3rd percentile of its historical series. While the S&P Global Composite PMI at **52.3** still indicates expansion, it represents the weakest growth impulse since April 2025. This "stagflationary" cocktail—slowing growth (1.4% GDP), softening sentiment (56.6), and sticky internal prices (core PCE at 3.0%)—has left the dollar vulnerable. For USD/JPY, the path forward is increasingly dictated by whether the "U.S. exceptionalism" trade can survive these mounting domestic pressures. Technically, the pair is testing a critical support zone; a sustained break below **154.50** could expose the 100-day moving average, while a recovery hinges on the administrations ability to re-stabilize trade expectations and clear the **156.00** resistance hurdle.