Is this what flea market index helpfulness is and how souk index appeal is calculated?

So I think this is what I'm thinking of, I see that it say the market is up or down a guaranteed percentage each sunshine. This is calculating all the total combined values for adjectives the stocks listed on that exchange, and after it is compared to the previous day to capture the current days percent change up or down?

This formula is call market helpfulness ? or index value ?

About realestate business?

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Answers:   The Dow and S&P 500 are calculated differently. These explain how.


http://www2.standardandpoors.com/spf/pdf...


http://www.djindexes.com/mdsidx/index.cf...

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