Equity benchmark indices Sensex and Nifty ended lower on Tuesday as a fag-end sell-off wiped out early gains, with IT and power stocks playing spoilsport amid a mixed trend in global markets. Snapping its two-day winning run, the 30-share BSE Sensex declined 188.50 points or 0.25 per cent to settle at 74,482.78. During the day, it had jumped 440.11 points or 0.58 per cent to 75,111.39.