140 Or 170? One June Decision Will Make or Break the Yen

The Japanese yen is standing at a crucial macro and technical turning point. On Wednesday morning, USD/JPY traded around 159.02, nearly touching the key 160 intervention level. Late last month, Japanese authorities intervened at this exact level, spending about $35 billion to push the pair down to 153. Yet the intervention effect faded quickly, and the yen resumed its decline within just three trading sessions.

Morgan Stanley’s Japan Head Alberto Tamura has outlined two extreme scenarios for USD/JPY. His latest analysis suggests the pair could rebound to 140 on BoJ tightening, or sink toward 170 if the central bank keeps rates unchanged. The yen’s next move hinges entirely on upcoming policy moves and global market conditions.

The BoJ’s mid-June policy meeting is the key catalyst that will decide the yen’s trend. Currency intervention can only deliver temporary relief. Only a genuine rate hike can fundamentally reverse the yen’s long-term downtrend.

Tamura points out the BoJ is already lagging behind market expectations, making a June rate hike necessary. He warns that keeping rates on hold in June will trigger volatility in Japan’s bond and FX markets, further weakening the yen. Markets widely expect the BoJ to raise rates from 0.75% to 1.00% in June, but internal disagreements remain. Three of nine board members already pushed for an immediate 1.00% rate hike in the April meeting.

FX intervention is only a temporary solution and cannot fix the core weakness of the yen: the huge US-Japan interest rate gap. Japan’s policy rate stands at 0.75%, while the Fed’s rate is between 3.50% and 3.75%. The nearly 300-basis-point gap fuels active carry trades. Investors consistently sell yen for higher US yields, keeping persistent selling pressure on the Japanese currency.

The yen’s trend no longer depends solely on Japan’s domestic policy. It is also heavily affected by Middle East geopolitical risks and the Federal Reserve’s monetary stance.

The June BoJ policy decision will determine the yen’s next big move. A rate hike will support a rebound toward 140, while no hike will open the door for a sharp drop toward 170.