iShares S&P 500 ex S&P 100 ETF(AMEX:XOEF)

XOEF delivers large-cap exposure but not the mega-cap companies. The universe is the S&P 500 index, excluding the 100 largest with listed options. Despite the common perception that the S&P 500 provides pure market-cap exposure to the US economy, its committee can exercise discretion to exclude specific companies. Holdings are weighted based on float-adjusted market capitalization. To reduce concentration, the index applies caps at each quarterly rebalance, ensuring no single company exceeds 22.5% of the index, and the combined weight of issuers with more than 4.5% stays below 48%. Between these rebalances, weights may temporarily fluctuate due to market movements or corporate actions.