Nomura says about 28 percent of Bharat Heavy Electricals Ltd's
"Coalgate" is a short-hand reference to the CAG report published on August 17 that questioned the government's practice of awarding coal mining concessions to companies without competitive bidding, potentially costing the treasury billions of dollars in lost revenues.
Nomura adds the coal allocation scam puts further risks to its FY13 earnings estimates for the company.
In another report, Macquarie said "BHEL is a value trap, stay clear" as in its worst-scenario analysis, BHEL's earnings can decline by 65 percent in FY15 from FY12 levels and the stock could move closer to 100 rupees.
At 1:15 p.m, shares in BHEL were up 1.5 percent at 204.20 rupees, after falling 8.1 percent in previous 2 sessions.