The benchmark BSE Sensex ended at a new closing peak of 30,658.77, up 76.17 points or 0.25 per cent and the NSE index Nifty gained 13.50 points or 0.14 per cent to a record 9,525.75.Domestic shares hit record closing highs, their third straight record close, helped by a surge in auto stocks such as Tata Motors Ltd later in the day.Both indexes also hit record intraday highs earlier.