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This will give modified duration a numerical value close to the Macaulay duration (and equal when rates are continuously compounded). Formally, modified duration is a semi- elasticity , the percent change in price for a unit change in yield, rather than an elasticity , which is a percentage change in output for a percentage change in input.
The modified Dietz method [1] [2] [3] is a measure of the ex post (i.e. historical) performance of an investment portfolio in the presence of external flows. (External flows are movements of value such as transfers of cash, securities or other instruments in or out of the portfolio, with no equal simultaneous movement of value in the opposite direction, and which are not income from the ...
The duration of a stock is the average of the times until its cash flows are received, weighted by their present values. The most popular model of duration uses dividends as the cash flows. In vernacular, the duration of a stock is how long we need to receive dividends to be repaid the purchase price of the stock.
The modified duration of a bond assumes that cash flows do not change in response to movements in the term structure, which is not the case for an MBS. For instance, when rates fall, the rate of prepayments will probably rise and the duration of the MBS will also fall, which is entirely the opposite behavior to a vanilla bond.
The time-weighted return (TWR) [1] [2] is a method of calculating investment return, where returns over sub-periods are compounded together, with each sub-period weighted according to its duration. The time-weighted method differs from other methods of calculating investment return, in the particular way it compensates for external flows.
The IRS uses your modified adjusted gross income (MAGI) to determine whether you qualify for important tax benefits like deducting contributions from your individual retirement account (IRA) and ...
Duration, Convexity, and Other Bond Risk Measures. Frank J. Fabozzi Series. Vol. 58. John Wiley and Sons. ISBN 9781883249632. Mayle, Jan (1994), Standard Securities Calculation Methods: Fixed Income Securities Formulas for Analytic Measures, vol. 2 (1st ed.), Securities Industry and Financial Markets Association, ISBN 1-882936-01-9. The ...
Bond duration Bond duration is the weighted-average time to receive the discounted present values of all the cash flows (including both principal and interest), while WAL is the weighted-average time to receive simply the principal payments (not including interest, and not discounting). For an amortizing loan with equal payments, the WAL will ...