A Mean-Variance Benchmark for Intertemporal Portfolio Theory
Mean-variance portfolio theory can apply to the streams of payoffs such as dividends following an initial investment, in place of one-period returns. This description is especially useful when returns are not independent over time and investors have non-marketed income. Investors hedge their outside income streams, and then their optimal payoff is split between an indexed perpetuity - the risk-free payoff - and a long-run mean-variance efficient payoff. "Long-run" moments sum over time as well as states of nature. In equilibrium, long-run expected returns vary with long-run market betas and outside- income betas. State-variable hedges do not appear in optimal payoffs or this equilibrium.
I thank the CRSP for research support. The views expressed herein are those of the author and do not necessarily reflect the views of the National Bureau of Economic Research.
John H. Cochrane, 2014. "A Mean-Variance Benchmark for Intertemporal Portfolio Theory," Journal of Finance, American Finance Association, vol. 69(1), pages 1-49, 02. citation courtesy of