NSE revised the quantity-freeze limit for Fin Nifty index derivatives to 1,200 contracts from 1,800. The change will take effect from December 1. Under the new rule, maximum order sizes for index-derivative trades have been reset, with limits of 600 for Bank Nifty, 1,800 for Nifty, 1,200 for Fin Nifty, 2,800 for Midcap Nifty, and 600 for Nifty Next 50.