New Delhi, April 4 (TIWN) India's key equity indices -- Sensex and Nifty -- extended their gains from the previous week and gained sharply in early trade on Monday.

Housing Development Finance Corporation (HDFC) on Monday said its board has approved the merger of its wholly owned subsidiaries HDFC Investments and HDFC Holdings with HDFC Bank.  At 10.30 a.m., Sensex was 2.5 per cent or 1,452 points up at 60,729 points, whereas Nifty 2.2 per cent or 389 points up at 18,060 points.