Consider a European down-and-out partial barrier call option where the barrier provision is activated only between the
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Consider a European down-and-out partial barrier call option where the barrier provision is activated only between the option’s starting date (time 0) and t1. Here, t1 is some time earlier than the expiration date T , where 0 1
under the risk neutral measure Q. Assuming S0 > B, show that the down-andout call price is given by (Heynen and Kat, 1994a)
where
Show that the above price formula reduces to the price function defined in (4.1.12a,b) when t1 is set equal to T.
Modify the price formula in Problem 4.6 by setting ρ = √t1/T σ1 = σ and σ2 = √t1/T σ so that γ12 = 1.
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