They are, and up to 21.7% now. How much can they creep up without making a bid?
Steel making requires a lot of coal so Tata's interest in a coal mining company is understandable. But Tata also has a joint venture interest with RIV in Benga and they would know more about the project than anyone else.
Is Tata positioning for a takeover or do they know something we don't know??