Lifting the Heston model
Abi Jaber, Eduardo
HAL, hal-01890751 / Harvested from HAL
How to reconcile the classical Heston model with its rough counterpart? We introduce a lifted version of the Heston model with n multi-factors, sharing the same Brownian motion but mean reverting at different speeds. Our model nests as extreme cases the classical Heston model (when n = 1), and the rough Heston model (when n goes to infinity). We show that the lifted model enjoys the best of both worlds: Markovianity and satisfactory fits of implied volatility smiles for short maturities with very few parameters. Further, our approach speeds up the calibration time and opens the door to time-efficient simulation schemes.
Publié le : 2019-07-04
Classification:  rough volatility,  Riccati equa- tions,  Riccati equa-tions,  Stochastic volatility,  implied volatility,  affine Volterra processes,  [QFIN.CP]Quantitative Finance [q-fin]/Computational Finance [q-fin.CP],  [MATH.MATH-PR]Mathematics [math]/Probability [math.PR]
@article{hal-01890751,
     author = {Abi Jaber, Eduardo},
     title = {Lifting the Heston model},
     journal = {HAL},
     volume = {2019},
     number = {0},
     year = {2019},
     language = {en},
     url = {http://dml.mathdoc.fr/item/hal-01890751}
}
Abi Jaber, Eduardo. Lifting the Heston model. HAL, Tome 2019 (2019) no. 0, . http://gdmltest.u-ga.fr/item/hal-01890751/