According to @KookCapitalLLC, traders should verify whether XYZ100 matches the Nasdaq-100 because NDX uses a defined methodology that excludes financial companies, applies modified market-cap weighting, rebalances quarterly, and reconstitutes annually, which determines its constituents. Source: https://indexes.nasdaq.com/docs/Methodology_NDX.pdf To view and compare holdings, pull the official Nasdaq-100 list via the Invesco QQQ holdings page (which replicates NDX) and match it against the XYZ100 issuer’s factsheet, methodology, or daily holdings page to confirm underlying equities. Sources: https://www.invesco.com/us/financial-products/etfs/product-detail?productId=QQQ ; https://www.investor.gov/introduction-investing/investing-basics/investment-products/exchange-traded-funds-etfs For trading, any deviation in constituents or weights versus NDX will change sector exposure and performance drivers relative to mega-cap growth, affecting tech-beta positioning often paired with BTC and ETH risk. Source: https://indexes.nasdaq.com/docs/Methodology_NDX.pdf