iShares MSCI USA Equal Weighted ETF (EUSA US) – Portfolio Construction MethodologyThe underlying MSCI USA Equal Weighted Index offers an equal-weight version of MSCI USA, holding the same large- and mid-cap constituents (covering ~85% of U.S. free-float market cap) but resetting all issuer weights to 1/N at rebalance. If an issuer has multiple lines, the issuer is equal-weighted and its lines are apportioned by free-float market cap. Reviews and rebalances occur quarterly—implemented as of the close on the ...