The fund provides exposure to global companies engaged in the production or extraction of base metals. The underlying index is a subset of the S&P/TSX Global Mining Index—a market-cap-weighted index of global companies in the mining industry, listed on either US or Canadian exchanges. XBM specifically includes companies that are classified in any of the three GICS sub-industries: aluminum, copper, and diversified metals and mining. In addition, firms must also meet certain size and liquidity screens to be selected. Holdings are weighted by market-cap and are constrained such that no individual security exceeds 10% weight of the portfolio. The index is rebalanced quarterly.