The Sensex at the Bombay Stock Exchange jumped 274 points, or 1.7 percent, to again close above the 16,000 level, at 16,222, as the rupee recovered some strength, and as the European markets firmed up on Thursday. The Nifty at the National Stock Exchange rose 86 points, or 1.8 percent, to 4,921.Stock markets in Japan, China, Hong Kong, South Korea and Singapore ended mixed.