Japan and South Korea Unite in Rare Currency Intervention

Japanese and South Korean authorities staged an unprecedented joint intervention in currency markets on July 30, aiming to stabilize their respective currencies. The move saw Japan's yen lifted away from its 40-year lows as it strengthened against the US dollar.

The intervention coincided with a similar action by South Korea, which firmed its won by 2% to reach its highest level in nine months. Market analysts believe that the joint effort could have doubled the impact of individual interventions by either country.

Lee Min-hyuk, an analyst at KB Kookmin Bank, said, 'The interests of each country aligned. For Korea-Japan cooperation, the won and the yen are so tightly coupled that a joint intervention could double the impact.'

The US dollar reached as high as 157.8 against the yen before the intervention, raising concerns about interest rate hikes and their potential impact on borrowing costs.

Japan has intervened in currency markets five times since 1985, either alone or in coordination with other G-7 partners. The latest joint effort coincided with a turn in the direction of the dollar-yen pair.