Short answer

MIS (Intraday) is only allowed for FINNIFTY contracts with Open Interest (OI) of more than 20,000 quantities [500 (lots) × 40 (lot size)].

MIS orders will be blocked if the Open Interest (OI) for any FINNIFTY contract is less than 20,000 quantities or 500 lots. However, exiting open positions will be allowed regardless of the OI restrictions.

When you place orders for such contracts, a notification will be displayed.

If you still place the order, it will be rejected with an error message.

You can check the OI for a particular F&O contract by clicking on the

icon. The OI will be displayed as quantities instead of lots.