Unabated buying led the Sensex rally to a fresh all-time intra-day high of 18,941, and the index is now up 505 points at 18,924 - just 76 points shy of the 19,000 landmark.The NSE Nifty hit a new all-time intra-day high of 5606, and is now up 171 points at 5599.Reliance Energy has zoomed nearly 9% to Rs 1,779. ONGC has soared nearly 6% to Rs 1,155.Tata Steel has surged 4.5% to Rs 887. Hindalco, Maruti and HDFC Bank have rallied 4% each to Rs 186, Rs 1,139 and Rs 1,486, respectively.Bharti Airtel has gained 3.5% at Rs 1,106. Reliance Communications, HDFC and Reliance have moved up 3% each to Rs 741, Rs 2,545 and Rs 2,643, respectively.NTPC has advanced 2.8% to Rs 224, and ICICI Bank has added 2.5% to Rs 1,080.ICICI Bank, ACC and Wipro are up over 2% each at Rs 1,080, Rs 1,279 and Rs 497, respectively.Out of 2,670 stocks traded so far, 1,952 have advanced, 657 have declined and 61 are unchanged.