As a result, the stock declined 6.52 per cent to Rs 318.70 on BSE.
On NSE, it went down 6.74 per cent to Rs 318.20.
While rejecting his charges of "political vendetta", the Madras High Court yesterday cancelled Dayanidhi Maran's interim anticipatory bail in the controversial telephone exchange case and directed him to surrender before CBI within three days.
CBI has registered an FIR against Maran and others alleging that more than 300 high-speed telephone lines were provided at his residence in Chennai and extended to his brother Kalanithi Maran's SUN TV channel to enable its uplinking when Dayanidhi Maran was Union Telecom Minister in 2004-07.