The NASDAQ 100 Index is engineered to mirror the market performance of a curated selection: the top 100 non-financial companies, encompassing both American and international entities, all of which are publicly traded on the NASDAQ Stock Market. The influence of these companies within the index is determined by their free-float adjusted market capitalization. While the constituent companies are re-evaluated annually, the index's weightings are adjusted and rebalanced on at least a quarterly basis.