Closed Form Valuation of American Barrier Options
Tempus Financial Engineering No. 4/98
5 Pages Posted: 23 Mar 1999
Date Written: February 22, 1999
Closed form formulae for European barrier options are well known from the literature. This is not the case for American barrier options, for which no closed form formulae have been published. One has therefore had to resort to numerical methods. Using lattice models like a binomial or a trinomial tree for valuation of barrier options is known to converge extremely slowly, compared to plain vanilla options. Methods for improving the algorithms have been described by several authors. However, these are still numerical methods that are quite computer intensive. In this paper we show how American barrier options can be valued analytically in a very simple way. This speeds up the valuation dramatically as well as give new insight into barrier option valuation.
JEL Classification: G13
Suggested Citation: Suggested Citation