A system and method for risk analysis of a portfolio of derivative products is disclosed which is conducted based on a set of flexible rules. The system and method allow creating predefined sets of products for the purpose of future risk offsets. If a futures trade as a subset of that set of products that met a threshold level, then the subset is assigned the offset value (or a pro rata or other portion of the offset value) of the predefined set. For example, assume that the predefined set consists of one S&P 500 futures, one NASDAQ futures, one S&P Midcap 400 futures and one Russell 1000 futures and the threshold is three. If the futures trader holds any three of those four futures, the three futures can be grouped, assigned an offset value, and this group can be used as one asset for purpose of further risk offsets.