De-allocation could raise import bill by $3 billion, add to coal shortage.
India plans to double coal production by 2020
Tata, Adani, Lanco to be hit as Indonesia may ban export of low-grade coal
Offloading shares in ONGC, CIL, NHPC may fetch govt more than the year's target.
The shift to gross calorific value-based grading of coal aligned domestic prices with international benchmarks.
Friendlier government policies, greater demand and better supply of coal have fuelled investor interest.