Unconditional asset pricing models have generally found it challenging to identify evidence of risk aversion. This paper addresses this challenge by examining whether currency portfolios display an intertemporal risk-return relationship. We consider time-varying relations because investors' risk-aversion may change over time, based upon changing economic states. Moreover, we take into account a broad based measure of investors' expectation from a data rich environment and factor model. We identify that the relations between risk and return vary over time, and the risk-aversion parameters on momentum and value currency portfolios increased during the financial crisis. Those parameters can command both positive and negative values. Therefore traditional time-invariant models may not identify strong risk-return relations because state dependent evidence is "washed out."