An IMEX-Scheme for Pricing Options under Stochastic Volatility Models with Jumps
Salmi, S., Toivanen, J., & von Sydow, L. (2014). An IMEX-Scheme for Pricing Options under Stochastic Volatility Models with Jumps. SIAM Journal on Scientific Computing, 36(5), B817-B834. https://doi.org/10.1137/130924905
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SIAM Journal on Scientific ComputingDate
2014Copyright
© Society for Industrial and Applied Mathematics. This is a final draft version of an article whose final and definitive form has been published by Society for Industrial and Applied Mathematics.
Partial integro-differential equation (PIDE) formulations are often preferable for
pricing options under models with stochastic volatility and jumps, especially for American-style
option contracts. We consider the pricing of options under such models, namely the Bates model
and the so-called stochastic volatility with contemporaneous jumps (SVCJ) model. The nonlocality
of the jump terms in these models leads to matrices with full matrix blocks. Standard discretization
methods are not viable directly since they would require the inversion of such a matrix. Instead,
we adopt a two-step implicit-explicit (IMEX) time discretization scheme, the IMEX-CNAB scheme,
where the jump term is treated explicitly using the second-order Adams–Bashforth (AB) method,
while the rest is treated implicitly using the Crank–Nicolson (CN) method. The resulting linear
systems can then be solved directly by employing LU decomposition. Alternatively, the systems can
be iterated under a scalable algebraic multigrid (AMG) method. For pricing American options, LU
decomposition is employed with an operator splitting method for the early exercise constraint or,
alternatively, a projected AMG method can be used to solve the resulting linear complementarity
problems. We price European and American options in numerical experiments, which demonstrate
the good efficiency of the proposed methods.
...
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