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(mén)副主管Jerald Schiff周二表示，日本只有在外匯市場(chǎng)劇烈波動(dòng)時(shí)才應入市進(jìn)行干預，并補充稱(chēng)，這類(lèi)干預行動(dòng)幾乎沒(méi)有持久效應。