Texas Instruments Calculator - Manual (Page 95)

Appendix — Reference Information 91
where
Duration is calculated using one of the following formulas used to
calculate Macaulay duration:
• For a bond price with one coupon period or less to redemption:
• For a bond price with more than one coupon period to redemption:
Depreciation
RDV
=
CST N SAL N accumulated depreciation
Values for
DEP
,
RDV
,
CST
, and
SAL
are rounded to the number of
decimals you choose to be displayed.
In the following formulas,
FSTYR
= (13 N MO
1) P 12.
Straight-line depreciation
First year:
Last year or more:
DEP
=
RDV
Dur 1
Y
M
----- +
 
 
Dsr
Rv 100 R
×
M
------------------ +
1
Dsr Y ×
E M Ч
-------------------
 
 
+
2
------------------------------------------ Ч
E M Pri Ч Ч
---------------------------------------------------------------- ⋅ =
CST SAL –
LIF
---------------------------
CST SAL –
LIF
--------------------------- FSTYR Ч