Benchmark equity indices Sensex and Nifty ended marginally lower in highly volatile trade on Tuesday as losses in IT and auto stocks were largely offset by gains in banking and oil shares amid mixed global trends. The 30-share BSE Sensex ended 40.14 points or 0.07 per cent lower at 57,613.72 as 19 of its stocks declined and 11 advanced. The index opened higher and further climbed 295.59 points or 0.51 per cent to touch a high of 57,949.45. It, however, failed to hold onto the gains and fell to a low of 57,494.91 later.