Mumbai, Aug 20 - A key index of the Indian equities markets extended its gains a little before Thursday noon, even as other key Asian indices climbed into the green after a dismal show Wednesday.

At 11.33 a.m., the 30-scrip benchmark index of the Bombay Stock Exchange (BSE), the Sensex, which had opened higher at 14,990.05 points, was ruling to 15,107.73 points -- 298.09 points or 2.01 percent higher than Wednesday's close.

At around the same time, the S&P CNX Nifty of the National Stock Exchange (NSE) too was trading in the positive terrain at 4,479.9 points, up 1.95 percent.

Broader market indices were also doing well, with the BSE midcap index trading 1.32 percent higher and the BSE smallcap index moving up 1.14 percent.

All the 13 sectoral indices on the BSE were in the green, with those for auto, metal and realty gaining the most.