The Index is a modified theme-adjusted free float market capitalization-weighted index. A theme-adjusted free float market value is calculated for each Index constituent as the product of its: (i) free float market capitalization; (ii) the issuing company's silver revenue percentage; and (iii) its liquidity factor. Companies within the Project Development sector have an assumed silver revenue of 100% for these purposes. Each Index constituent's initial weight is determined by dividing its theme-adjusted free float market value by the aggregate theme-adjusted free float market value of all Index components. Initial weights are then adjusted to determine final weights to reduce excessive concentration by: (1) first, raising each Index constituents initial weight to the power of 0.50; and (2) second, dividing the adjusted initial weight by the aggregate adjusted initial weight of all Index constituents. Index constituents are then grouped based on their market capitalization at the time of the Reconstitution Reference Date. Group 1 Index constituents are those that have a market capitalization at or above the 90th percentile of the portfolio. Group 2 constituents consist of all other Index constituents. Weights from step (2) above are further adjusted on a pro-rata basis such that: (i) the aggregate weight of Group 1 securities cannot exceed 15% of the total portfolio weight; and (ii) no Index constituent weight may exceed 10%.