"ArcelorMittal has shown interest in the stake buy and the due diligence will start soon," said an official familiar with the development. The Facor stock closed at Rs 23.5 a share on the Bombay Stock Exchange today. At the current price, the company has a market capitalisation of Rs 435 crore. However, the deal is expected at Rs 35 a share, about 50 per cent premium to the current market price.