This would benefit if Nifty is almost rangebound but if nifty falls to say 4100 than 4300 call will expire almost worthless giving a loss of about 200 - 50 (earned from selling current month nifty) = Rs-150 loss. Nevertheless this strategy could prove fruitful if Nifty remains in a tight range.
One more strategy could be to sell out of money puts and calls say if we want to play safe and believe nifty will remain between 3900 and 4700 or a much safer side when nifty is at 4300 ,we are taking almost 10% move on either side, though we may not earn much premium but we could be on a safer side, We sell Nifty 3900 put and Nifty 4700 call. Movement beyond both these figures will result in a loss.
One more strategy could be to sell out of money puts and calls say if we want to play safe and believe nifty will remain between 3900 and 4700 or a much safer side when nifty is at 4300 ,we are taking almost 10% move on either side, though we may not earn much premium but we could be on a safer side, We sell Nifty 3900 put and Nifty 4700 call. Movement beyond both these figures will result in a loss.