Traditional mean-variance efficient portfolios do not capture the potential wealth creation opportunities provided by predictability of asset returns. We propose a simple method for constructing optimally managed portfolios that exploits the possibility that asset returns are predictable. We...

We examine the daily activity and performance of a large panel of individual investors in Sweden's Premium Pension System. We find that active investors earn higher returns and risk-adjusted returns than inactive investors. A performance decomposition analysis reveals that most of the...