benchmark stock indices sensex and nifty rallied more than 1.6 per cent to close at lifetime high levels on thursday following buying in banking, oil and auto shares and a record dividend payout by the rbi to the government. regaining the 75,000 level after its best single-day gain since january 29, the 30-share bse sensex closed at all-time peak of 75,418.04, up by 1,196.98 points or 1.61 per cent over the last close. during the day, it zoomed 1,278.85 points or 1.72 per cent to reach its all-time intra-da