Year: 2015
Type: article
Abstract: We consider an asset whose risk‐neutral dynamics are described by a general class of local‐stochastic volatility models and derive a family of asymptotic expansions for European‐style option prices and implied volatilities. We also establish rigorous error estimates for these quantities. Our implied volatility expansions are explicit; they do not require any special functions nor do they require numerical integration. To illustrate the accuracy and versatility of our method, we implement it under four different model dynamics: constant elasticity of variance local volatility, Heston stochastic volatility, three‐halves stochastic volatility, and SABR local‐stochastic volatility.
Source: Mathematical Finance
DOI: 10.1111/mafi.12105
Language: English
Subfield: Finance
Domain: Social Sciences
Open Access status: green
Funder: Fondation du Risque
OpenAlex ID: W2950618784