SGDM offers exposure to equity in gold mining firms. The index-based fund holds stocks classified as gold miners in Americas and Asia/Pacific according to the RBICS industry system. The weighting scheme starts with market cap weights, then adds or subtracts weight based on three fundamental factors: higher revenue growth, lower debt to equity and higher free cash flow yield. (These factors receive equal weight in the score, but the firms themselves are not equal weighted.) Firms with favorable scores receive more weight, while those with lower scores have weight removed, but apparently are still retained in the index. Maximum single position is 18% at rebalance (with additional RIC concentration screens). The Underlying Index is reconstituted and rebalanced quarterly. Prior to July 22, 2019, the fund tracked the Sprott Zacks Gold Miners Index.