Monroe 3180 ユーザーガイド

 

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AVERAGE LIFE 

 
 
The average life function calculates the average life and maturity date of a sinking fund issue.  Average 
life calculations may be performed for Code 0 issues only. 
 
Retirements may be annual or semi-annual, or a combination of both; the COUPON PER YEAR key is 
set before each group of sinkers is entered.  Enter each group of sinkers in consecutive order, starting 
with the group with the earliest beginning retirement date.  The number retired must always be entered 
before pressing the AVG LIFE key, the previous number is not retained (even if it is the same). 
 
The beginning date for the group is entered on the CALLD ATE BEGIN key and the ending date is 
entered on the MAT DATE END KEY.  The number of bonds for the sinker is then entered on the AVG 
LIFE key, completing the retirement for the group. 
 
The dates are updated automatically, depending on the COUPONS PER YEAR key setting, to six or 
twelve months after the last ending date.  (Assuming that the next group is contiguous and contains only 
one sinker.) 
 
If the next group is contiguous but has more than one sinker, you must modify the ending date according 
to the number of sinkers with the same number of bonds per sinker. 
 
Of course, if the next group is not contiguous, you must enter both the beginning and the ending dates. 
 
ENTERY SEQUENCE FOR AVERAGE LIFE CA 

Start the average life sequence by entering the quantity of bonds outstanding nt he BEGIN, AVG LIFE 
key. 
 
 

PRESSED 

 Beginning 

Date 

CALL DATE BEGIN 

 Ending 

Date 

MAT DATE END 

 

Set the sinker frequently, if necessary 

COUPONS PER YEAR 

 

Quantity to be sunk each period 

AVG LIFE 

 
Remember the contiguous beginning date is automatically computed and stored on the CALLD ATE 
BEGIN and MAT DATE END keys.  Therefore, if the groups are contiguous, the beginning date need not 
be entered and if the group has only one sinker, the ending date also does not need to be entered. 
 
Note:  The beginning and ending dates may be verified at any time during the entry sequence by 
pressing  DISPLAY< CALL DATE BEGIN and DISPLAY, MAT DATE END respectively.  Compute 
Average Life by pressing DISPLAY, AVG LIFE and the average life in decimal years’ displays.  This also 
calculates the date of the average life and stores it on the MAT DATE END key.  DISPLAY, MAT DATE 
END displays the date of average life which is stored.