In this paper we deal with the numerical approximation of
integro-differential equations arising in financial applications
in which jump processes act as the underlying stochastic processes.
Our aim is to find finite differences schemes which are high-order accurate
for large time regimes.Therefore, we study the asymptotic time behavior of such equations
and we define as asymptotic high-order schemes those schemes
that are consistent with this behavior. Numerical tests are presented to investigate the
efficiency and the accuracy of such approximations.