The Sensex has cracked below its recent May 22 low of 9827. The index is now down 146 points at 9811.ONGC has shed almost 4% to Rs 1,000. NTPC and Ranbaxy have dropped 3.7% each to Rs 102 and Rs 374, respectively.Reliance Energy has tumbled 3.5% to Rs 410. SBI and Hindalco have slipped nearly 3% each to Rs 816 and Rs 156, respectively.Dr.Reddy's is down 2.5% at Rs 1,237. Hero Honda and Gujarat Ambuja have declined 1.7% each to Rs 745 and Rs 88, respectively.Out of 2,180 stocks traded so far, 1,944 have declined, 209 have advanced and the are unchanged.