Asian shares scale fresh four-month highs; dollar up

By Saikat Chatterjee HONG KONG (Reuters) - Asian stocks rose to their highest levels in more than four months on Thursday and regional currencies weakened led by the Singapore dollar as hopes grew that more central banks will join the city state in easing monetary policy in the coming months. MSCI's broadest index of Asia-Pacific shares outside Japan rose 0.5 percent, reaching its highest level since Nov. 26. Singapore's central bank on Thursday surprised markets by setting the rate of appreciat