After a year of wild swings, the yen surprised traders by settling into a tight range clustered near 158 per dollar over recent months. But on Wednesday it broke out again, unexpectedly weakening toward 160, a move that underscores how difficult Japan's currency has become to trade. Traditional signals such as interest-rate differentials have grown less reliable guides, while Bank of Japan tightening, persistent capital outflows and unprecedented intervention have pulled the yen in competing directions.
The stakes extend far beyond Japan. The yen is one of the world's most heavily traded currencies, changing hands in some $1.6 trillion of transactions each day. Its direction can make or break the fortunes of global investors, while its longer-term trajectory affects everything from Japanese inflation to the flow of the nation's vast pool of savings into overseas markets. Rajeev De Mello, global macro portfolio manager at Gama Asset Management SA, which manages about 600 million Swiss francs in assets, said the competing forces had made the timing and magnitude of yen moves much harder to anticipate, and that he had reduced his yen positions to reflect the greater uncertainty.S1
The case for buying the yen rests on several points: the BOJ has raised interest rates at the fastest pace since 1990, yields at home are near multi-decade highs, and officials in both Tokyo and Washington have shown a willingness to intervene when the currency falls too quickly. The case for selling is equally strong. Japanese interest rates remain well below those in the US and other major economies, and some investors see the BOJ as moving too slowly to close the gap. That keeps carry trades attractive, while Japanese companies, institutions and households continue deploying large amounts of capital overseas. Long-term views are sharply divided, with Marlborough Investment Management's James Athey expecting significant yen appreciation and Fidelity International's Lei Zhu seeing further depreciation as the bigger risk, while others such as T. Rowe Price Group Inc.'s David Clewell have stayed out of the currency for an extended period.S1
The yen has proved no easier for policymakers to steer. Finance Minister Satsuki Katayama led an intervention campaign in late July to put a floor under the currency, backed by US Treasury Secretary Scott Bessent, who has staked a smaller sum but a good deal of his credibility on supporting it. Japan has spent a record ¥27.1 trillion ($169.7 billion) buying yen this year, almost three times the nation's combined trade deficit and direct-investment outflows. The intervention helped pull the currency back from a 40-year low near 164 in July, but the yen has since retraced much of that advance, and this week's breach of 160 was followed by a rebound on speculation that officials would intervene again.S1S2
