- . - , , .
, . .
. , , , , . , .
, , ( ), . , , , , . , -. , . , .
:
:
PV present value, , .
FV future value, , .
I = (FV - PV) interest money, , . .
I , .. PV . , .
r = I / PV = (FV - PV) / PV interest, .
(, ), :
FV = PV * (1 + r).
, , .
:
(PV) = 300 000 .
(r) = 17% (0,17)
FV = 300 000 * (1 + 0,17) = 351 000 . .
: , , . ( ):
d = I/FV = (FV-PV)/FV discount rate, , .
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: d = (351 000 300 000) / 351 000 = 0,145 (14,5%)
, , n d, :
P = 1 / (1 + d)n
- , , . , .
NPV.
NPV (Net Present Value, NPV), , ( ) . .
.
(NPV>0), .
, NPV (), - -.
NPV , , .
NPV=0 , . , .. .
NPV:
, N (), :
FC = FC1 + FC2 + + FCN,
:
FC
FC1 ..
NPV = FC1 / (1 + D) + FC2 / (1 + D) 2 + FC3 / (1 + D) 3 ..
D . , , .