Though it looks like a good windfall gain, but if one digs deeper it seems DVR shareholders are getting shortchanged.
In 2008 during Rights issue, when DVR was issued for the 1st time at 305; while Tata Motors shares were being issued at 340; so the differential then was only 10%; if we follow this ratio, DVR share holders should get 9 shares of Tata Motors for every 10 shares instead of only 7.