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Holomorphic jump-diffusions

Author

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  • Cuchiero, Christa
  • Primavera, Francesca
  • Svaluto-Ferro, Sara

Abstract

We introduce a class of jump-diffusions, called holomorphic, of which the well-known classes of affine and polynomial processes are particular instances. The defining property concerns the extended generator, which is required to map a (subset of) holomorphic functions to themselves. This leads to a representation of the expectation of power series of the process’ marginals via a potentially infinite dimensional linear ODE. We apply the same procedure by considering exponentials of holomorphic functions, leading to a class of processes named affine-holomorphic for which a representation for quantities as the characteristic function of power series is provided. Relying on powerful results from complex analysis, we obtain sufficient conditions on the process’ characteristics which guarantee the holomorphic and affine-holomorphic properties and provide applications to several classes of jump-diffusions.

Suggested Citation

  • Cuchiero, Christa & Primavera, Francesca & Svaluto-Ferro, Sara, 2026. "Holomorphic jump-diffusions," Stochastic Processes and their Applications, Elsevier, vol. 191(C).
    • Handle: RePEc:eee:spapps:v:191:y:2026:i:c:s030441492500225x
    DOI: 10.1016/j.spa.2025.104781
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