The yen depreciated vis-Ã -vis the U.S. dollar today as the greenback tested offers around the Â¥99.90 level and was supported around the Â¥98.40 level. The yen was given across the board as risk appetite returned to markets following gains in U.S. equity markets and a sense that Group of Twenty officials could be making progress at their London summit. Bank of Japan is expected to broaden its quantitative easing framework in the near future, possibly by purchasing a greater range of asset-backed securities. The Nikkei 225 stock index climbed 4.40% to close at Â¥8,719.78. U.S. dollar offers are cited around the Â¥104.15 level. The euro moved higher vis-Ã -vis the yen as the single currency tested offers around the Â¥134.25 level and was supported around the Â¥130.30 level. The British pound moved higher vis-Ã -vis the yen as sterling tested offers around the Â¥146.90 level while the Swiss franc moved higher vis-Ã -vis the yen and tested offers around the Â¥87.85 level. In Chinese news, the U.S. dollar closed at CNY 6.8340 in the over-the-counter market.