Routinely, practictioners and academics alike propose the use of trading strategies with an alleged improvement on the risk-return relation, tipically entailing a considerably higher return for the given level of risk. A very popular example is "A quantitative approach to tactical asset...

Liquidity is a risk factor of primary relevance that can significantly affect the asset allocation decisions of investors. In this paper, we introduce the concept of portfolio staleness and propose a simple framework to manage portfolio liquidity, intended as the cost needed to liquidate the...