"Sooner or later, a greater part of our businesses will surely be taken up by the exchange, a more transparent platform," said a senior official from PTC India Ltd, the country's largest power trading company that accounts for about a quarter of the total volume of electricity traded in the country. Interestingly, PTC is one of the co-promoters of the exchange. Another major player in the power trading sector, NTPC Vidyut Vyapar Nigam Ltd, has confirmed similar apprehensions