The Sensex at the Bombay Stock Exchange rose 68 points, or 0.3 percent, to close at an over one-week high of 20,215, today, amid some encouraging corporate results. The Nifty at the National Stock Exchange added 20 points, or 0.3 percent, to 6,124.But stock markets in Japan, China, Hong Kong, South Korea and Singapore declined between 0.3 percent and 5.2 percent.