The index seeks to target 75% of the float-adjusted market capitalization (i.e., the amount of stock that is available for trading by the general public) of each GICS Industry Group within the S&P MidCap 400 Index, using the ESG scores assigned to the companies in the Eligible Universe by the index provider as the determining factor. The fund will invest at least 80% of its total assets (but typically far more) in component securities of the index.