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cc-by (c)  Alòs, Elisa et al., 2026
Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/230044

Analytic Approximation for Bachelier Option Prices and Applications

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It is well-known that, in the Bachelier model, when asset prices and volatilities are uncorrelated, the at-the-money implied volatility coincides with the fair value of the volatility swap. Using this identity as a starting point and applying classical Itô calculus and Taylor expansions, we write the price for out-of the-money (OTM) and in-the-money (ITM) options as an expansion with respect to the moneyness, where the coefficients are related to the negative (non-integer) powers of the future mean volatility. As an a application, we use it as a control variate to reduce the variance of Monte Carlo option prices in the correlated case.

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ALÒS, Elisa and BURÉS MOGOLLÓN, Òscar. Analytic Approximation for Bachelier Option Prices and Applications. Entropy. 2026. Vol. 28, num. 6. ISSN 1099-4300. [consulted: 11 of October of 2026]. Available at: https://hdl.handle.net/2445/230044

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