Equity benchmark indices ended in the positive territory on Wednesday on buying in HDFC Bank and a largely firm trend in Asian markets. Fag-end buying helped the BSE Sensex climb 100.26 points or 0.15 per cent to settle at 65,880.52. During the day, it had declined 292.23 points or 0.44 per cent to 65,488.03. The Nifty advanced 36.15 points or 0.18 per cent to end at 19,611.05.