Breaking News – Change in Bank Nifty F&O Lot Size Last Updated On October 26, 2018 10:02 AM by Neal Bhai Gold Silver Reports (GSR) – Effective from today, Bank Nifty lot size has been changed from 40 to 20. If you have an existing position with one lot of 40, your position will now be for 2 lots of 20 units. READ MORE