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The market capitalization of the constituent companies is used to create the majority of stock market indexes. This method gives larger cap companies a higher weighting, which means their performance has a greater impact on an index's value than smaller cap companies. Some famous indexes, such as the Dow Jones Industrial Average (DJIA), are price-weighted. This method gives more weight to firms with higher share prices, which means that changes in their values have a bigger impact on an index's current price.