Japanese Yen Weakens as Impact of US and Japan Joint Intervention Fades

The Japanese yen has lost approximately half of the gains it made following a joint intervention by the United States and Japan. On Monday, the currency weakened by 1 percent to end the session at 159.29 yen per dollar, marking the worst performance among Group of 10 peers for that day. The currency had previously recovered from a multi decade low of around 164 yen per dollar in late July to nearly 155 yen following the intervention, but it has since declined again.

Market analysts suggest the measure was weakened by a lack of a unified voice among central banks. Reports indicate that the European Central Bank was not consulted by the US before the decision to sell euros to support the yen. Investors believe that intervention alone has limited effectiveness unless accompanied by interest rate hikes from the Bank of Japan. Some traders now estimate a 50 percent probability that the Bank of Japan will raise its basic interest rate by 0.25 percentage points at its September meeting.

While the intervention's long term effect on the yen is questioned, economists note that the move helped other currencies. The Thai baht appreciated beyond 33 baht to the dollar, reaching a six week high of 32.87 on Friday. This appreciation is attributed to the US and Japan intervention as well as weaker than expected US employment data, which reduced expectations for a Federal Reserve rate hike in September.

Financial experts warn that if Japan is forced to sell its vast reserves of US Treasuries to support the yen, it could push US yields higher and create volatility within the US financial system and the broader global market.