How do investors' expectations drive asset prices?



and the solution of equation (13) for u(t,x) is (see Appendix)

u(t,x1,x2 )


Xi exp ^-x2 J^ λ1 ∖s)ds)


exp ɑʃ (λ^2∖r) σy (r) + b(r)^ ^ʃ — ʌɑ∖s)ds) dr)


Hence, Ft is given by


Ft = It exp -~σt ʃ ʌɑs)ds^


exp

exp


^- ʃ (λ^2∙∖r) σ'^ (r) + b(rɔ ʌɑs)ds) dr)
( f
T1 σ (r))2f f    ∖s>y dr} , 0 t T,


and


Z' = (⅞> )= F ' —'σ'(t)ʃ, <∙ >(^)ds )


The forward price of the asset can be rewritten as


dF = Ftσf (√1 pt2λ<1 ∖t) + У2∖t)pi)dt

+Ftσξ (√1 pt2dWt1 + pt dWt,  0 t T,


(14)


with


Fiσf := ∖∕(Z<1 >)2 + (Z,<2 <


and


F
.
1∕(zl<'> )2+ (zy)2


(15)


17




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