This ETF, the Vanguard Mega Cap, is designed to replicate the performance of the CRSP US Mega Cap Index. It employs a passively managed, full-replication approach, purchasing all constituents of its benchmark. The fund provides a straightforward avenue for diversified investment into the premier U.S. companies, collectively representing approximately the leading 70% of domestic market capitalization. Regarding 75% of its total assets, the fund is subject to specific limitations: it may not buy more than 10% of any single issuer's voting shares, nor invest in a company if that allocation would cause more than 5% of the fund's total assets to be held in that issuer's securities. However, these restrictions are waived if exceeding them is necessary to precisely approximate the target index's composition. Notably, these concentration limits do not apply to obligations issued by the U.S. government or its associated agencies and instrumentalities.