State-owned Indian Oil Corporation (IOC) on Thursday said it will raise its stake in the joint venture building a 9 million tonnes refinery at Chennai to 75 per cent after the cost to the project escalated by over 12 per cent. Originally, IOC and its subsidiary Chennai Petroleum Corporation Ltd (CPCL) were to hold a 25 per cent stake in the joint venture that was to build a new unit adjacent to the existing refinery of CPCL. The remaining 50 per cent equity was to come from financial investors.
