The Nifty India Defence Index which aims to track the performance of portfolio of stocks that broadly represent the Defence theme. From the Nifty Total Market index, stocks forming part of eligible basic industries or those which obtain at least 10% of revenues from the defence industry are eligible to be included in the index and are chosen based on 6 month average free-float market capitalization. The weight of the stocks in the index is based on their free-float market capitalization. Stock weights are capped at 20%.