The Sensex at the Bombay Stock Exchange was trading lower by 80 points at 33,650 in late morning deals.Earlier, the 30-share index gained 122 points to hit all-time high of 33,853 in the opening trade, breaching its previous intra-day record of 33,848 reached on Monday. On the other hand, Nifty fell by 25 points to trade at 10,426 a short while ago.Meanwhile, paring early gains, the rupee today slipped by 6 paise to 64 rupee 74 paise per dollar in the late morning deals.The rupee had opened higher at 64.65 per dollar in the early trade.