subhadip ji ... how it gets unlimited loss ?
It is the potential loss that can be incurred.
When you buy option for inr. 200, worst case it goes to 0.
So you have a limited max loss of inr. 200
on the other hand,
if you sell for inr 200, max gain for you is inr. 200 (option goes to 0)
but if move is against you, and say it goes to inr. 1k, or inr. 2k and so on
but that's in theory for BN to move 10000-20000pt in a day
so even the term unlimited has a finite potential.