more advanced approaches involve simulation modeling of the market risk factors and risk factor scenarios and then revaluing each derivative using,for example,thousands of simulation scenarios by a hundred time steps.the resulting matrix of simulation by scenarios and time steps is then aggregated to generate an expected exposure profile for each netting counterparty.A collateralized expected exposure profile is then derived by adjusting each counterpaty's expected exposure profile to account for the receiving and posting of collateral as applicable.some market participants only consider CVA pertaining to their exposures to counterpartie,though the majority also calculate an offsetting DVA,which is the coumterparty's exposure to the market participant.CVA and DVA are then netted to calculate bilateral CVA