False beliefs are what keep us from achieving our best. In the active, passive management debate by analogy, false beliefs are those preventing investors from building an optimal portfolio. I worry that in this debate, a number of false beliefs hamper portfolio construction optimization.

As a researcher on active and passive management and an expert in portfolio construction, I am convinced of the importance of the combination of active and passive funds to build outperforming portfolios.

My priority is, therefore, to highlight these false beliefs in order to subsequently provide you with solutions to improve the construction of your portfolios.