BEHIND the large headlines that screamed from the front pages of financial dailies lies a mystery that's yet to be unravelled: why should Sterlite Industries want to buy a 20 per cent stake in Indian Aluminium (Indal), when there's no way that it can get its hands on the company? With a 35 per cent stake in Indal, the Canadian aluminium major Alcan will still remain the largest shareholder and call the majority shots. Including management control. So why is Anil Agarwal, the homegrown entrepreneurial success story, willing to dole out Rs 90 per share of Indal?