** Shares of refiner Indian Oil Corp Ltd rise as much as 3.9 pct to their highest since Feb 23 on the first day trading as part of the 50-member Nifty index run by NSE
** Stock posts its biggest intraday pct gain since Feb 1
** NSE announced addition of IOC last month, said change to take effect on March 31
** As of Thursday's close, IOC shares had gained about 15.9 pct so far this year vs a 12.1 pct rise in the NSE index
