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Joint deep calibration of the 4-factor PDV model

Author

Listed:
  • Fabio Baschetti
  • Giacomo Bormetti
  • Pietro Rossi

Abstract

Joint calibration to SPX and VIX market data is a delicate task that requires sophisticated modeling and incurs significant computational costs. The latter is especially true when pricing of volatility derivatives hinges on nested Monte Carlo simulation. One such example is the 4-factor Markov Path-Dependent Volatility (PDV) model of Guyon and Lekeufack (2023). Nonetheless, its realism has earned it considerable attention in recent years. Gazzani and Guyon (2025) marked a relevant contribution by learning the VIX as a random variable, i.e., a measurable function of the model parameters and the Markovian factors. A neural network replaces the inner simulation and makes the joint calibration problem accessible. However, the minimization loop remains slow due to expensive outer simulation. The present paper overcomes this limitation by learning SPX implied volatilities, VIX futures, and VIX call option prices. The pricing functions reduce to simple matrix-vector products that can be evaluated on the fly, shrinking calibration times to just a few seconds.

Suggested Citation

  • Fabio Baschetti & Giacomo Bormetti & Pietro Rossi, 2025. "Joint deep calibration of the 4-factor PDV model," Papers 2507.09412, arXiv.org.
    • Handle: RePEc:arx:papers:2507.09412
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    References listed on IDEAS

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