Slope of Gap Options

mardi 24 février 2015

Hi all,

Example 14 D of the ASM Manual gives:

For a gap call option:

If K = 60, Option prem = 3.45

If K = 70, Option prem = .81



Question 2 asks: Determine the strike price such that the option premium is 0.



first they find slope, which I also was able to solve for: (.81 - 3.45)/(70-60) = -.264



Then to solve for x they say:

.81 - .264(x-70) = 0.



Solving for x yields x=73.07.



Can someone explain to me how the bolded formula was determined to be the correct formula to use, and what a generic formula would be to be used in similar examples?





Slope of Gap Options

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