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  2. List of price index formulas - Wikipedia

    en.wikipedia.org/wiki/List_of_price_index_formulas

    This is the formula that was used for the old Financial Times stock market index (the predecessor of the FTSE 100 Index). It was inadequate for that purpose. In particular, if the price of any of the constituents were to fall to zero, the whole index would fall to zero.

  3. Price index - Wikipedia

    en.wikipedia.org/wiki/Price_index

    While Vaughan can be considered a forerunner of price index research, his analysis did not actually involve calculating an index. [1] In 1707, Englishman William Fleetwood created perhaps the first true price index. An Oxford student asked Fleetwood to help show how prices had changed.

  4. Törnqvist index - Wikipedia

    en.wikipedia.org/wiki/Törnqvist_index

    This approach is called the indirect way of calculating a Törnqvist index, [4] and it generates numbers that are not exactly the same as a direct calculation. There is research on which method to use based partly on whether price changes or quantity changes are more volatile. [4] For multifactor productivity calculations, the indirect method ...

  5. Index (economics) - Wikipedia

    en.wikipedia.org/wiki/Index_(economics)

    For example, in the Consumer Price Index, a reference year's "market basket" is assigned an index number of 100. In 2019 if a market basket price is 55 and the basket were to double the following year, in 2020, then the index would rise to 200. This is done by performing a simple calculation: Dividing the new year market basket price by the ...

  6. Single-index model - Wikipedia

    en.wikipedia.org/wiki/Single-index_model

    These equations show that the stock return is influenced by the market (beta), has a firm specific expected value (alpha) and firm-specific unexpected component (residual). Each stock's performance is in relation to the performance of a market index (such as the All Ordinaries). Security analysts often use the SIM for such functions as ...

  7. Price-weighted index - Wikipedia

    en.wikipedia.org/wiki/Price-weighted_index

    Adjustment Factor = Index specific constant "Z" / (Number of shares of the stock * Adjusted stock market value before rebalancing) A stock trading at $100 will thus be making up 10 times more of the total index compared to a stock trading at $10. The Dow Jones Industrial Average and Nikkei 225 are examples of price-weighted stock market indexes.

  8. Lerner index - Wikipedia

    en.wikipedia.org/wiki/Lerner_Index

    We can use the value of the Lerner index to calculate the marginal cost (MC) of a firm as follows: 0.4 = (10 – MC) ÷ 10 ⇒ MC = 10 − 4 = 6. The missing values for industry B are found as follows: from the E d value of -2, we find that the Lerner index is 0.5. If the price is 30 and L is 0.5, then MC will be 15:

  9. Hedonic index - Wikipedia

    en.wikipedia.org/wiki/Hedonic_index

    A hedonic index is any price index which uses information from hedonic regression, which describes how product price could be explained by the product's characteristics.. Hedonic price indexes have proved to be very useful when applied to calculate price indices for information and communication products (e.g. personal computers) and housing, [1] because they can successfully mitigate problems ...