HP 0012C-90001, Руководство пользователя

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Appendix D: Appendix D: Appendix D: Appendix D: Formulas Used Formulas Used Formulas Used Formulas Used 187 187 187 187
File name: HP 12c+_user's guide_English_E_HDP0F12AE03_062608 - Modified.doc Page: 187 of 213
Printed Date: 2021/6/16 Dimension: 14.8 cm x 21 cm
Discounted Cash Flow Analysis Discounted Cash Flow Analysis Discounted Cash Flow Analysis Discounted Cash Flow Analysis
Net Present Value
Net Present Value Net Present Value
Net Present Value
NPV = net present value of a discounted cash flow.
CF
j
= cash flow at period
j .
n
n
i
CF
i
CF
i
CF
CF NPV
) 1 (
...
) 1 (
) 1 (
2
2
1
1
0

 



 
Internal Rate of Return Internal Rate of Return Internal Rate of Return Internal Rate of Return
n
= number of cash flows
CF
j
= cash flow at period
j
.
IRR
= Internal Rate of Return
0
1
) 1 (
) 1 ( 1
0
CF IRR
IRR
IRR
CF
j q
j
nq
k
j
n
j







 








 
 
 




Calendar Calendar Calendar Calendar
Actual Day Basis
Actual Day Basis Actual Day Basis
Actual Day Basis

DYS = f(
DT
2
) – f(
DT
1
)
where
f(
DT
) = 365 (
yyyy
) + 31 (
mm
– 1) +
dd
+ INTG (
z
/4) –
x
and
for
mm 
2
x
= 0
z
= (
yyyy
) – 1
for
mm
> 2
x
= INTG (0.4
mm
+ 2.3)
z
= (
yyyy
)
INTG = Integer portion.
Note: Note: Note: Note: Additional tests are performed in order to ensure that the century (but
not millennium) years are not considered leap years.
30/360 Day Basis 30/360 Day Basis 30/360 Day Basis 30/360 Day Basis
DAYS = f( DT
2
) – f( DT
1
)
f( DT ) = 360 ( yyyy ) + 30 mm + z
for f( DT
1
)
if dd
1
= 31 then z = 30
if dd
1

31 then z = dd
1
for f( DT
2
)
if dd
2
= 31 and dd
1
= 30 or 31 then z = 30
if dd
2
= 31 and dd
1
< 30 then z = dd
2
if
dd
2
< 31 then
z
=
dd
2