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  2. Duration (finance) - Wikipedia

    en.wikipedia.org/wiki/Duration_(finance)

    a = fraction of a period remaining until next coupon payment; m = number of full coupon periods until maturity; P = bond price (present value of cash flows discounted with rate i) For a bond with coupon frequency but an integer number of periods (so that there is no fractional payment period), the formula simplifies to: [25]

  3. List of price index formulas - Wikipedia

    en.wikipedia.org/wiki/List_of_price_index_formulas

    The Marshall-Edgeworth index, credited to Marshall (1887) and Edgeworth (1925), [11] is a weighted relative of current period to base period sets of prices. This index uses the arithmetic average of the current and based period quantities for weighting. It is considered a pseudo-superlative formula and is symmetric. [12]

  4. Sales promotion - Wikipedia

    en.wikipedia.org/wiki/Sales_promotion

    Therefore, before making a purchase, consumers may weigh their options as either a gain or a loss to avoid the risk of losing money on a purchase. [5] A "gain" view on a purchase results in chance taking [ 5 ] For example, if there is a buy-one-get-one-half-off discount that seems profitable, a shopper will buy the product.

  5. Amortization calculator - Wikipedia

    en.wikipedia.org/wiki/Amortization_calculator

    An amortization calculator is used to determine the periodic payment amount due on a loan (typically a mortgage), based on the amortization process.. The amortization repayment model factors varying amounts of both interest and principal into every installment, though the total amount of each payment is the same.

  6. Rate of return - Wikipedia

    en.wikipedia.org/wiki/Rate_of_return

    An annual rate of return is a return over a period of one year, such as January 1 through December 31, or June 3, 2006, through June 2, 2007, whereas an annualized rate of return is a rate of return per year, measured over a period either longer or shorter than one year, such as a month, or two years, annualized for comparison with a one-year ...

  7. Payback period - Wikipedia

    en.wikipedia.org/wiki/Payback_period

    To calculate a more exact payback period: Payback Period = Amount to be Invested/Estimated Annual Net Cash Flow. [4] It can also be calculated using the formula: Payback Period = (p - n)÷p + n y = 1 + n y - n÷p (unit:years) Where n y = The number of years after the initial investment at which the last negative value of cumulative cash flow ...

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  9. Supply (economics) - Wikipedia

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

    The quantity supplied is for a particular time period (e.g., the tons of steel a firm would supply in a year), but the units and time are often omitted in theoretical presentations. In the goods market , supply is the amount of a product per unit of time that producers are willing to sell at various given prices when all other factors are held ...