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Modified duration

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Definition of Modified duration

Modified Duration Image 1

Modified duration

The Macaulay duration discounted by the per-period
interest rate; i.e., divided by (1+rate/frequency).


Modified duration

The ratio of Macaulay duration to (1 + y), where y = the bond yield. modified duration is
inversely related to the approximate percentage change in price for a given change in yield.



Related Terms:

Dollar duration

The product of modified duration and the initial price.


Duration

A common gauge of the price sensitivity of an asset or portfolio to a change in interest rates.


Duration

The weighted average of the time until maturity of each of the
expected cash flows of a debt security


Duration

The expected life of a fixed-income security considering its coupon
yield, interest payments, maturity, and call features. As market interest rates
rise, the duration of a financial instrument decreases. See Macaulay duration.



Duration

The time it takes for a policy or annuity to reach maturity.


Effective duration

The duration calculated using the approximate duration formula for a bond with an
embedded option, reflecting the expected change in the cash flow caused by the option. Measures the
responsiveness of a bond's price taking into account the expected cash flows will change as interest rates
change due to the embedded option.


Modified Duration Image 2

Fully modified pass-throughs

Agency pass-throughs that guarantee the timely payment of both interest and
principal. Related: modified pass-throughs
Functional currency As defined by FASB No. 52, an affiliate's functional currency is the currency of the
primary economic environment in which the affiliate generates and expends cash.


Macaulay duration

The weighted-average term to maturity of the cash flows from the bond, where the
weights are the present value of the cash flow divided by the price.


Macaulay duration

A widely used measure of price sensitivity to yield
changes developed by Frederick Macaulay in 1938. It is measured in years and
is a weighted average-time-to-maturity of an instrument. The Macaulay
duration of an income stream, such as a coupon bond, measures how long, on
average, the owner waits before receiving a payment. It is the weighted
average of the times payments are made, with the weights at time T equal to
the present value of the money received at time T.


MACRS (Modified Accelerated Cost Recovery System)

A depreciation method created by the IRS under the Tax Reform Act of 1986. Companies must use it to depreciate all plant and equipment assets installed after December 31, 1986 (for tax purposes).


Modified Accelerated Cost Recovery System (MACRS)

Depreciation method that allows higher tax deductions in early years and lower deductions later.


modified FIFO method (of process costing)

the method of cost assignment that uses FIFO to compute a cost per
equivalent unit but, in transferring units from a department,
the costs of the beginning inventory units and the
units started and completed are combined and averaged


Modified pass-throughs

Agency pass-throughs that guarantee (1) timely interest payments and (2) principal
payments as collected, but no later than a specified time after they are due. Related: fully modified passthroughs


Mortgage duration

A modification of standard duration to account for the impact on duration of MBSs of
changes in prepayment speed resulting from changes in interest rates. Two factors are employed: one that
reflects the impact of changes in prepayment speed or price.


Negative duration

A situation in which the price of the MBS moves in the same direction as interest rates.



 

 

 

 

 

 

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