Method and system for implementing an adaptive investing methodology. An asset allocation is determined for each of a plurality of periods of a model duration that optimize an objective function. The asset allocations identify for each of the periods how much of the investment account to invest in one or more asset classes. The objective function subtracts a value of a shortfall risk function from an expected value of an amount of income to be generated by an annuity purchased at the end of the model duration with funds in the investment account at the end of the model duration. The asset allocations are associated with values of a plurality of investor variables. The values of the plurality of investor variables and their associated asset allocations may be stored in one or more wealth tables and used to look up asset allocations for one or more investors.