If tomorrow's stock price is a coin flip between two values, which of the six inputs to a call's price will turn out not to matter?
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Tomorrow's stock price as a Bernoulli trial
Draw the timeline with branching to with probability and with probability , record that is only a labelling convention, and give one illustrative pair.
The two option values and
Write and , and compute both for one illustrative choice of , , and .
The six candidate inputs to
List , , , , and the one-period riskless rate , and record the claim that the closed-form price depends on all of them except one.