We are standardizing the Fno option stock strikes for better trade in FNO Segment. "Option stock strikes are allowed based on the 10% Band up and Down from the underlying Ltp (future spot price) for trading. 

Ref: FUTSTK-HDFC-24NOV22

Spot price :2500*10% =250

Lower Band Strike price you can trade :2500-250 = 2250
Upper Band Strike price you can trade  : 2500+250 = 2750

In Option Chain strikes from 2250 till 2750 Range will be allowed for Trading. It will be revised based on the Ltp changes.