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24.
. / , .
=: Pp+Ps=Pc+E/eRT, Pp Ps . .
- . : Pp=Pp+E/eRT-P
.., - . /, BORM - . , - .
.: . 3 . $40. . . $36 50%. 5% - . , -=$2,26. .. 5% - , - =$39,50 (40/e0,05*0,25). .. Pc=$2.26, E/eRT =$39.50 Ps=$36, / - - . :
Pp=(2,26+39,5-36)=5,76.
/, - - (Vc=N(d1)Ps-(E/eRT)N(d2)) - . . :
Pp= (E/eRT)N(-d2)-PsN(-d1),
d1=(ln(Ps/E)+(R+0.5σ2)T)/(σ √T)
d2=(ln(Ps/E)+(R-0.5σ2)T)/(σ √T)=d1-σ √T,
Ps .
E
R
T ,
σ , , %
- d1=-0,25, d2=-0,50. .., N(-d1)=N(0.25)=0.5987 N(d2)=N(0.50)=0.6916. :
Pp=((40/e0.05*0.25)*0.6915)-(36*0.5987)=27.31-21.55=5.76
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