Convergence of Strategies: An Approach Using Clark-Haussmann's Formula

We consider a binomial model that converges towards a Black-Scholes model as the number of trading dates increases to infinity. The models considered are complete and hence every claim is generated by an appropriate trading strategy. Fixing a path dependent claim the paper treats weak and pathwise convergence of the corresponding strategy. It is well known that in a binomial model the generating strategy is easily expressed in terms of stock prices and prices of the claim. In contrast, the Black-Scholes model essentially only allows an explicit representation when the underlying claim is differentiable (in some sense), in which case the strategy is defined in terms of Clark-Haussmann's Formula. Hence, attention is restricted to the case when the claim is differentiable. The strategy is then shown to be convergent and a (very simple) version of Clark-Haussmann's Formula is established.