Yen Surges on Rate Hike Expectations, Dollar Firms Ahead of US Payrolls

The Japanese yen has surged against the US dollar this week, putting it on track for its strongest week in over a month. The yen strengthened to as much as 155.25 per dollar in Asia trade before retreating to 156.28, down 0.3%.

This sudden jump in the yen reflects growing expectations that the Bank of Japan could be more hawkish than previously expected when it meets on September 17-18. Analysts say there is a lack of evidence of official action, and the market's reaction may be driven by anticipation of rate hikes.

Atsushi Mimura, Japan's top currency diplomat, stated he remains alert to exchange-rate moves and is in constant contact with US authorities. Ray Attrill, head of FX strategy at National Australia Bank, said that unless there are significant policy surprises or more aggressive intervention by the US Fed on behalf of the yen, a sustained move below 155 is unlikely.

JPMorgan noted that expectations for Japanese pension funds repatriation and BOJ rate hikes 'look somewhat overdone' but added that an unwinding of estimated $102.36 billion to $108.76 billion in yen shorts could send the dollar to a 142-146 range against the Japanese currency.