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=DURATION(settlement, maturity, coupon, yield, frequency, basis)=
 
=DURATION(settlement, maturity, coupon, yield, frequency, basis)=
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*Where 'settlement' is the security's settlement date,  
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*Where 'settlement' is the security's settlement date (a date when coupon is purchased),  
*'maturity' is the security's maturity date,  
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*'maturity' is the security's maturity date (a date when coupon expires),  
 
*'coupon' is the security's annual coupon rate,  
 
*'coupon' is the security's annual coupon rate,  
 
*'yield' is the security's annual yield,  
 
*'yield' is the security's annual yield,  
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*'basis' is the type of day count basis to use.
 
*'basis' is the type of day count basis to use.
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DURATION() gives the Macauley duration for an assumed par value of $100.
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DURATION() gives the Macauley duration of a security for an assumed par value of $100.
    
== Description ==
 
== Description ==
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