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Chapter 4. Financial Engineering --- Nesting GARCH and GARCH Option Pricing Theory. A. GARCH Family History. (A) ARCH(R.Engle,1982). ARCH(1):. (B) GARCH(T.Bollerslev,1986). GARCH(1,1). (C) GARCHM (Engle and Bollerslev,1986). GARCHM(1,1). (D) EGARCH (D. Nelson, 1991). EGARCH(1,1).
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Chapter 4 Financial Engineering --- Nesting GARCH and GARCH Option Pricing Theory
(A) ARCH(R.Engle,1982) ARCH(1):
(B) GARCH(T.Bollerslev,1986) GARCH(1,1)
(C) GARCHM (Engle and Bollerslev,1986) GARCHM(1,1)
(D) EGARCH (D. Nelson, 1991) EGARCH(1,1)
(E) NAGARCH (Engle and Ng, 1993) NAGARCH(1,1)
(A)Assumptions 1.The spot price S(t) follow NAGARCH-M process • p=q=1 and β1+α1r12<1 • Continuous-time limit
Risk-neutral form where, 2.The value of a call option with one period to expiration obeys the Black-Sholes-Rubinstein formula.
(B)Model • Proposition I: The risk-neutral process takes the same NAGARCH form with λ replaced by –1/2 and r1 replaced by r1*= r1+λ+1/2
Proposition II: The generating function takes the log-linear form where for the single log(p=q=1) version and these coefficients can be calculated recursively from the terminal conditions: A(T;T,ψ)=0 B1(T;T,ψ)=0
Proposition III: If the characteristic function of the log spot price is f(iψ), then where Re[ ] denotes the real part of a complex number.
European call option: Et*[ ]: denotes the expectation under risk-neutral distribution.