After a pause yesterday, the bulls were back in action today taking the Sensex to a new record levels. The index opened with a positive gap of 19 points at 8208.Therafter, the index exhibited range-bound movement till the mid-noon deals. The buying gained momentum in the last trading session. Heavy buying towards the close saw the index finish at a new high at 8284, up 94 points from its previous close.The Nifty scaled to a new lifetime high of 2528, before settling with gains of 32 points at 2524.Grasim was the major gainer, among the Sensex stocks. The stock surged 4.3% to Rs1,400, followed by TCS up 3.6% at Rs1,450. ACC, Bharti Tele, Gujarat Ambuja, Hindalco, HLL, HDFC, ITC, Maruti, Reliance, Tisco and Tata Power gained 1-3% each.On the other hand, Bajaj Auto, Hero Honda and Tata Motors ended with marginal losses.The market breadth was extremely positive with nearly three advancing shares for every declining stock. Out of a total of 2656 stocks traded on the BSE, 1905 stocks advanced and 704 stocks declined while 47 stocks were unchanged.