Determining the Implied Volatility for American Options Using the QAM

George W Kutner

The Financial Review, 1998, vol. 33, issue 1, 119-30

Abstract: This paper describes an efficient numerical procedure which may be used to determine implied volatilities for American options using the quadratic approximation method. Simulation results are presented. The procedure usually converges in five or six iterations with extreme accuracy under a wide variety of option market conditions. A comparison of American implied volatilities with European model implied volatilities indicates that significant differences may arise. This suggests that reliance on European model volatilities estimates may lead to significant pricing errors. Copyright 1998 by MIT Press.

Date: 1998
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Persistent link: https://EconPapers.repec.org/RePEc:bla:finrev:v:33:y:1998:i:1:p:119-30

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