Abstract: A data processing system and method is provided for managing futures contracts that are based on baskets of credit default swaps as underlyings. A data storage stores data identifying each credit default swap of at least two baskets, and repetitively updated values for credit default swaps of the baskets. A parallelization command is received which indicates at least one credit default swap from a first basket, wherein the credit default swap is a credit default swap not having suffered a credit event. Further, second basket data is generated in response to a received parallelization command. The data storage stores repetitively updated values for credit default swaps of the second basket and continues storing repetitively updated values for credit default swaps of the first basket.