Benchmark equity indices reached new record high levels in a volatile session on Monday following buying in energy and banking shares. Extending its rally to the fourth session in a row, BSE Sensex rose by 66.14 points or 0.09 per cent to settle at an all-time high of 73,872.29. The NSE Nifty 50 rose by 27.20 points or 0.12 per cent to close at a lifetime high of 22,405.60 points. Sector-wise it was a mixed bag with buying seen at Oil & Gas, Financials, and Private Banking.