Shares of Vodafone Idea soared 11 per cent to Rs 8.04 on the BSE in intra-day trade on Tuesday amid heavy volumes in an otherwise subdued market. At 10:40 am, the stock of the telecom services operator was up 8 per cent, as compared to a 0.29 per cent decline in the S&P BSE Sensex. A combined 491 million equity shares had changed hands on the counter in the first one-and-half hour of trading on the NSE and BSE.