Time Diversification and Risk Management : A Probabilistic Approach

This study reveals that time diversification is not a strategy for risk management at all. At the end of the longer time horizons, age-old experienced gainers discover that they hold only a basket of inferior stocks or a few performing stocks or both. This paper contends that time cannot make a below-performing stock to be a performing one only by way of aging with time horizons. In an efficient market, with expanding holding periods only, one cannot improve the portfolio size over the average portfolio size for the actual and potential probable losses as well