The fund delivers excellent large-cap exposure to US firms much like any ETFs tracking the S&P 500. It provides an outstanding outlook to the 500 largest companies of the US equity market whilst being market-cap weighted. Despite the common perception that the index offers pure market-cap exposure to the US economy, its committee can exercise discretion to exclude specific companies in seeking long-term capital growth. Overall, XUS delivers comprehensive exposure to the U.S stock market inexpensively. The index is rebalanced quarterly.