A Look Under the Hood of Invesco's Strategic Indexes The Invesco Strategic index suite aims to pick bigger and better stocks and weights them according to the size of their businesses. Each index starts with an investable universe of stocks (U.S. stocks, emerging-markets stocks, and so on). Stocks in this universe are assigned a business-size score. This score is an equal-weighted average of four measures: sales, cash from operations, dividends plus share repurchases, and book value. Each of these values are calculated using five years of data and then standardized as a percentage of the total value for the investable universe. Stocks that are in the top 90% of cumulative size within the selection universe are eligible for inclusion in the index.