Deriving the put-call parity
Think of it this way: C + (-P) = forward contract. Work it out from there. Anyways, this stack is meant for professionals, not students, I think.
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Deriving the put-call parity

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Think of it this way: C + (-P) = forward contract. Work it out from there. Anyways, this stack is meant for professionals, not students, I think.