Mumbai, July 31 - A key index of the Indian equities markets extended its morning gains Friday and was ruling 1.75 percent up from its last closing figure, even as its Asian peers continued to trade in the green.

Positive corporate results also seemed to boost confidence among investors.

At 12.22 p.m., the 30-scrip benchmark index of the Bombay Stock Exchange (BSE), the Sensex, which opened lower at 15,449.47 points, was at 15,657.39 points -- 269.43 points or 1.75 percent higher than Thursday's closing figure.

The S&P CNX Nifty of the National Stock Exchange (NSE) too was trading in the green at 4,643 points, up 1.57 percent.

Broader market indices also moved into the positive with the BSE midcap index trading 1.35 percent higher and the BSE smallcap index moving up 0.81 percent.

Of the 13 sectoral indices on the BSE, those for FMCG, banking and energy stocks were gaining the most.