The Bank of Japan (BOJ) must tread cautiously in raising interest rates, as some indicators of inflation expectations remain short of its 2 per cent target, the International Monetary Fund's Japan mission chief Nada Choueiri said on Friday. Choueiri told Reuters that a weak yen had a net-positive impact on Japan's economic growth, and signaled the IMF's preference for the country to allow exchange rates to move flexibly. "We continue to believe that flexible exchange rates have served the global economy well," Choueiri said in an interview during the spring meetings of the IMF and World Bank in Washington, when asked ... (full story)