Hitesh,
I agree, most of the recent research reports, by Emkay, icici etc estimate a Rs 80 fy17 EPS, and have given targets of 1700 + giving a very reasonable valuation of around 18 FY 17 EPS.
FY 16 EPS estimateD is expected to double, to Rs 90 from 44 in fy 15.
What the co does with this cash is also imp, if it acquires something or shares with shareholders.
But one thing is sure that it is a very safe bet with limited downside and there can be upside if Mr M takes notice of the same.