Shares of Vodafone Idea (Vi) surged 18 per cent to Rs 7.04 on the BSE in the intra-day trade on Friday, a day after the government introduced a Bill in Parliament to nullify the provision of retrospective tax in the Income Tax Act. With today’s gain, the stock of the telecom services has bounced back 55 per cent from Thursday's intra-day low of Rs 4.55 on the BSE.