Japan should only intervene in the foreign-exchange market during periods of high volatility, a senior official at the International Monetary Fund said Tuesday, adding that such action has little lasting effect.

    國際貨幣基金組織亞太部門副主管Jerald Schiff周二表示，日本只有在外匯市場劇烈波動時才應入市進行干預，并補充稱，這類干預行動幾乎沒有持久效應。