** Indian Energy Exchange's IIAN.NS stock surged nearly 11% to close at 148.7 rupees
** Electricity tribunal's comments, per CNBC-TV18 report, on Central Electricity Regulatory Commission (CERC) plan to implement market coupling seen to be favourable for energy exchange IIAN
** Last year, CERC decided to implement market coupling from January; IIAN slumped 30% next day
** Market coupling is an economic model used in energy markets to create a single, uniform price for electricity across different trading platforms or exchanges, diluting IIAN's dominant position
** Tribunal sets Jan 9 for next hearing and could close case on same day
** IIAN did not respond to Reuters' request for comment
** More than 23.6 mln shares traded, 4x the 30-day avg
(Reporting by Abhirami G and Bharath Rajeswaran in Bengaluru)
((abhirami.g@thomsonreuters.com))