Yen Fluctuations Highlight Current Trading Difficulties, Investors Have Huge Divergence on Long-term Outlook

After a year of turmoil, the yen's exchange rate against the dollar has traded unexpectedly within a narrow range around 158 in recent months. However, this week, the yen broke the calm again, unexpectedly falling below the important threshold of 160, before rebounding amid market speculation that officials would step in to support the exchange rate.

The sudden movement highlights just how difficult it is to trade the yen today. The reliability of traditional guiding signals, such as interest rate differentials, has diminished, while the Bank of Japan's tightening monetary policy, continued capital outflows, and unprecedented intervention actions are pulling the yen in different directions.

The impact is far from limited to Japan itself. The yen is one of the most actively traded currencies globally, with an average daily turnover of about $1.6 trillion. Its movements can make or break the wealth of global investors, and its long-term trajectory affects various aspects, from inflation in Japan to the outflow of funds from the country's massive savings pool.

"The challenge is that these competing forces make the timing and magnitude of yen fluctuations harder to predict," said Rajeev De Mello, global macro portfolio manager at Gama Asset Management SA. "Due to increased uncertainty, I have reduced my yen positions." The firm manages about 600 million Swiss francs in assets.

There are compelling reasons to buy yen now: the Bank of Japan is raising interest rates at the fastest pace since 1990, domestic yields are at multi-decade highs, and officials in Tokyo and Washington have also shown a willingness to intervene when the exchange rate falls too quickly.

But the reasons to sell are equally strong. Japan's interest rates remain far below those of the U.S. and other major economies, and some investors believe the Bank of Japan is moving too slowly to narrow this gap. This keeps carry trades attractive, while the country's corporations, institutions, and households continue to heavily allocate overseas assets.

There is a significant divergence in long-term views, with James Athey of Marlborough Investment Management expecting the yen to appreciate significantly, while Fidelity International's Zhu Lei believes the risk of further depreciation is greater.

Some have chosen to exit altogether. David Clewell of Putnam has not touched the yen for a long time, while Carol Lye of Brandywine Global Investment Management has opted to avoid the dollar-yen this year, instead trading the yen against the euro.