The Japanese yen is once again teetering on the brink of a significant threshold—155 against the US dollar—prompting analysts to raise warnings about the potential for a hawkish shift from the Bank of Japan (BOJ). The foreign exchange landscape has seen the yen struggling intensely, as evidenced by the sharp fluctuations in the USD/JPY exchange rate this past week, which rose to around 155. Such movements could compel Japanese authorities to intervene verbally, warning that prolonged yen weakness may lead to pressing interest rate hikes.
In the current month alone, the USD/JPY exchange rate has climbed approximately 2.8%, positioning the yen among the weakest currencies in the global marketplaceShould it surpass the pivotal 155 mark, this would represent the highest value for the dollar against the yen since November 22 of the previous year, signaling deeper concerns for economists and policymakers alike.
On Tuesday, during the European trading session, the dollar against yen exhibited slight fluctuations, hovering near 154. A sustained increase would mark the seventh consecutive day of gains—a notable surge that has not been seen since June
Akira Moroga, Chief Market Strategist at Aozora Bank, articulated a critical perspective, stating emphatically, "I see 155 as a significant milestoneWhen the yen hits this level, I expect a shift in the stance of Japanese authorities along with increased likelihood of the BOJ raising interest rates.”
The global financial market is intricately woven, and data available from overnight index swaps have become indispensable for market participants closely monitoring BOJ's monetary policy trajectoryCurrent estimates suggest that the likelihood of the BOJ raising interest rates this week stands at merely 19%, a figure that underscores a relatively subdued expectation among traders regarding immediate policy hikesReflecting on earlier dynamics this month, reports from various media outlets significantly dampened expectations for a rate increase after a previous forecast had suggested approximately 60% probability for a hike in December
Speculations stemming from interpretations of domestic Japanese economic data or comments by BOJ officials have led to a cautious and conservative sentiment in the market, substantially diminishing the anticipation surrounding any imminent policy recalibrations.
In a report released last week, Shigeto Nagai, Japan Economics Director at Oxford Economics, provided a profound analysis of the BOJ's current communication strategy with the marketHis observations indicated a perplexing state—an ambiguity that might entail a decision to maintain stable rates for the time beingThis cautious approach appears rooted in the Bank's desire to await more clarity on key economic indicators, particularly the outcomes of the upcoming spring wage negotiations and the evolving policy landscape in the United States
These wage negotiations hold enormous sway over Japan's domestic consumption, inflation expectations, and overall economic vigorSubstantial wage increases could enhance consumer spending capacity, subsequently contributing to a gradual rise in price levels, thereby furnishing a more robust economic foundation for the BOJ's potential policy adjustmentsConversely, the implications of U.Spolicy maneuvers—irrespective of whether concerning interest rates, government spending, or taxation—cannot be understated; as the world's largest economy, U.Sfiscal and monetary decisions ripple across global markets, influencing Japan's economic stability.
Offering insights from a foreign exchange perspective, Vishnu Varathan, Chief Economic and Strategy Officer at MUFG Bank, expressed concern about the rapid depreciation of the yen observed this week

He affirmed that this alarming trend presents significant repercussions for both the BOJ and the Ministry of FinanceA continuously depreciating yen may trigger a cascade of negative outcomes on the domestic economy, including heightened inflationary pressures driven by surging prices of imported goodsMoreover, firms relying on imported raw materials will experience alarming increases in production costs, hampering profitability and diminishing international competitiveness—elements crucial for Japan’s economic momentumShould the dollar continue to rise against the yen, breaching the 155 threshold, a vocal intervention by authorities becomes increasingly likelyThese verbal interventions serve to signal a concern for excessive currency fluctuations while aiming to stabilize market expectations through guided communication, which could, in theory, temper the depreciation of the yen.
Varathan warned that if the yen continues to lose value, potentially plummeting to around 157 or 158, the pressure on the BOJ to initiate a rate hike would be significantly intensified
In light of this scenario, leveraging interest rates as a tool to combat yen depreciation, stabilize prices, and maintain economic equilibrium might become more appealingAn interest rate hike could draw foreign capital to yen-denominated assets, hence increasing demand for the currency, which may bolster its valueNot only that, but elevated rates would also act to restrain domestic inflation, ameliorating the shock that rapidly escalating prices could otherwise impose on the economyThe intricate dilemma, however, lies in the fact that raising interest rates could inadvertently stifle domestic investment and consumption—twin engines essential for economic recovery, thereby compelling the BOJ to navigate its policy choices with utmost prudence amidst these intricate circumstances.
The trajectory of the yen will largely hinge on the outcomes of the Federal Reserve's policy meeting scheduled just hours before the BOJ convenes