The Sensex at the Bombay Stock Exchange rallied 249 points, or 1.2 percent, to close at 20,958, on good buying interest by funds, today. The Sensex had lost 189 points in the previous two trading sessions. The Nifty at the National Stock Exchange climbed 80 points, or 1.3 percent, to 6,241.But stock markets in Japan, China, Hong Kong, South Korea and Singapore lost between 0.1 percent and 1.5 percent.