According to a circular released by the exchange, the market lot for the Nifty 50 derivative contract will be reduced by half, decreasing from 50 to 25. Similarly, the lot size for the Nifty Financial Services derivative contract will decrease from 40 to 25, while for the Nifty Midcap Select, it will decrease from 75 to 50.

As per NSE circular dated September 30, a total of 37 stocks will see changes in their F&O lot sizes due to the relevant price movements.