Option pricing and hedging with temporal correlations
We consider the problem of option pricing and hedging when stock returns are correlated in time. Within a quadratic-risk minimisation scheme, we obtain a general formula, valid for weakly correlated non-Gaussian processes. We show that for Gaussian price increments, the correlations are irrelevant, and the Black-Scholes formula holds with the volatility of the price increments on the scale of the re-hedging. For non-Gaussian processes, further non trivial corrections to the `smile' are brought about by the correlations, even when the hedge is the Black-Scholes Delta-hedge. We introduce a compact notation which eases the computations and could be of use to deal with more complicated models.
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|Date of creation:||Nov 2000|
|Publication status:||Published in International Journal of Theoretical and Applied Finance 5 (3) (2002) 307-320|
|Contact details of provider:|| Postal: 6 boulevard Haussmann, 75009 Paris, FRANCE|
Web page: http://www.science-finance.fr/
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