The portfolio selection problem with one safe and n risky assets is analyzed via a new decision theoretic criterion based on the Recourse Certainty Equivalent (RCE). Fundamental results in portfolio theory, previously studied under the Expected Utility criterion (EU), such as separation theorems, comparative static analysis, and threshold values for inclusion or exclusion of risky assets in the optimal portfolio, are obtained here. In contrast to the EU model, the present results for the RCE maximizing investor do not impose restrictions on either the utility function or the underlying probability laws. The authors also derive a dual portfolio selection problem and provide it with a concrete economic interpretation.
