Hull's development of the Wiener process Assumes changes in a process, z, are given as Δz = ενΔt where & follows N(0,1). Then clearly Ε(Δz) = 0 stdev (Az) = √At Var (Az) = At With independence of all Ázs and with Τ = Ν · Δt N We usually set z(0)=0 z(T) - Z(0) = ₁√At i=1 Implies process is Markov 32

Linear Algebra: A Modern Introduction
4th Edition
ISBN:9781285463247
Author:David Poole
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Chapter3: Matrices
Section3.7: Applications
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can you explain what the Wiener Process is and what these variables states

Hull's development of the Wiener process
Assumes changes in a process, z, are given as
Az = ɛVAt
where ɛ follows N(0,1). Then clearly
E(Az) = 0
= EVAT
Implies process
is Markov
stdev(Az) = VAt
Var(Az) = At
With independence of all Azs and with
T = N•AT
N
z(T) – z(0) = > ɛ¡VAt
%3D
We usually set
z(0)=0
i=1
32
Transcribed Image Text:Hull's development of the Wiener process Assumes changes in a process, z, are given as Az = ɛVAt where ɛ follows N(0,1). Then clearly E(Az) = 0 = EVAT Implies process is Markov stdev(Az) = VAt Var(Az) = At With independence of all Azs and with T = N•AT N z(T) – z(0) = > ɛ¡VAt %3D We usually set z(0)=0 i=1 32
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