Benchmark Sensex closed above the 73,000 level for the first time while broader Nifty scaled the 22,000-point peak on Monday as key stock indices stayed on the record-breaking run powered by a rally in IT shares, Reliance and HDFC Bank. Rising for the fifth day in a row, the 30-share BSE Sensex jumped 759.49 points or 1.05 per cent to settle at a lifetime closing high of 73,327.94. During the day, it rallied 833.71 points or 1.14 per cent to hit an all-time intra-day peak of 73,402.16. The Nifty climbed 202.90 points or 0.93 per cent to settle at a new closing high of 22,097.45. During the day, it zoomed 221 points or 1 per cent to reach a lifetime intra-day high of 22,115.55.