The equal-weighted version of the NASDAQ-100 Index, which consists of 100 of the largest, most actively traded non-financial U.S. companies listed on the Nasdaq. Each of the securities in this market-capitalization based index is initially set at a weight of 1%. The equal weighting means that the index's smaller companies contribute as much as its larger companies. Taobiz explains NASDAQ-100 Equal Weighted Index This equal-weighted index offers an alternative to market-capitalization weighting, which is a more common method of weighting index funds. The NASDAQ-100 Equal Weighted Index is rebalanced quarterly and is reconstituted annually in December. There are several ETFs that track the movements of the index.