Includes the top or bottom x number of components, sorted by weight, market cap or beta.

Weight - weighted is calculated by multiplying price per share x number of shares in the index.

Market Cap - market cap is calculated by multiplying number of outstanding shares x price per share.

Beta - beta indicates how the price of a stock will move with respect to changes in the market. A beta of 1 indicates that the price of the stock will move with the market. Higher than 1 indicates that the price is more volatile than the market, and lower than 1 indicates the price is less volatile than the market.