Journal of Computational Finance

Risk.net

A parity result for American options

Robert L. McDonald, Mark D. Schroder

ABSTRACT

This paper demonstrates that when the price of the underlying asset is governed by geometric Brownian motion the price of a call option with underlying asset price S, strike price K, interest rate ã, and dividend yield ä is equal to the price of an otherwise identical put option with asset price K, strike price S, interest rate ä, and dividend yield ã. The result is true for both European and American options, and implies that the prices of at-the-money American call and put options on futures are equal.

Sorry, our subscription options are not loading right now

Please try again later. Get in touch with our customer services team if this issue persists.

New to Risk.net? View our subscription options

If you already have an account, please sign in here.

You need to sign in to use this feature. If you don’t have a Risk.net account, please register for a trial.

Sign in
You are currently on corporate access.

To use this feature you will need an individual account. If you have one already please sign in.

Sign in.

Alternatively you can request an individual account here: