LONDON (AP) -- Japanese stocks led the way in world markets Monday after the country's central bank eased monetary policy again in its latest attempt to shore up the economy. Last Friday's hint from the Federal Reserve chief that the U.S. central bank was ready to do more to help the U.S. economy had already helped stocks around the world start the week on a positive tone. Nevertheless, the Nikkei 225 stock average proved to be the standout, closing up 158.20 points, or 1.8 percent, to 9,149.26 after the Bank of Japan decided at an emergency board meeting to further ease monetary policy by expanding a low-interest loan program for financial institutions to 30 trillion yen ($355 billion) from 20 trillion yen. There may be some disappointment that the move has seemingly done nothing to halt the export-sapping appreciation in the yen -- by mid-morning London time, the dollar was down 0.7 percent at 84.75 yen. Last week's decline in the dollar to a 15-year low of 83.61 yen proved to be the catalyst to the Bank of Japan's emergency meeting. The worry is that the rising yen will make it more difficult for Japan's high-value exporters to compete in international markets. That would further threaten the country's paltry economic recovery -- recent figures showed that Japan's economy grew by only 0.1 percent in the second quarter from the previous three-month period.