Extending the falling streak to the third day in a row, benchmark BSE Sensex declined by 220 points in volatile trade on Tuesday due to profit-taking in power, oil and capital goods shares ahead of results of Lok Sabha polls. After gyrating between gains and losses during the day, the 30-share BSE Sensex ended 220.05 points or 0.29 per cent lower at 75,170.45. During the day, it hit a high of 75,585.40 and a low of 75,083.22.