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The article describes a global and arbitrage-free parametrization of the eSSVI surfaces introduced by Hendriks and Martini in 2019. A robust calibration of such surfaces has already been proposed by the quantitative research team at Zeliade in 2019, but it is sequential in expiries and lacks of...
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volatility of credit spreads, generates a flexible credit term structure and provides a good fi t to a century of observed … spreads. The model matches the widespread volatility smirk in index options as well as the first two moments of government …
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