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.

    国际货币基金组织亚太部门副主管Jerald Schiff周二表示，日本只有在外汇市场剧烈波动时才应入市进行干预，并补充称，这类干预行动几乎没有持久效应。