Mumbai, July 28 - A key index of the Indian equities markets crept back into the green and was ruling 57 points higher than its previous close, about 90 minutes before the closing bell Tuesday.

At 1.53 p.m., the 30-scrip benchmark index of the Bombay Stock Exchange (BSE), the Sensex, which opened higher at 15,350.89 points before slipping into the red in the morning session, was ruling at 15,438.24 points -- 63.2 points or 0.41 percent higher than Monday's closing figure.

Around the same time, the S&P CNX Nifty of the National Stock Exchange (NSE), too, was in the positive terrain, 0.49 percent up at 4,594.5 points.

Broader market indices were doing better with the BSE midcap index trading 1.51 percent higher and the BSE smallcap index moving up 2.08 percent.