A thought-provoking piece (first one in the link) arguing against concentrated equity portfolios – the orthodoxy of the day.
Concentrated portfolios are built on the idea of “analytical certainty” which lends itself easily to “overconfidence” and “overweighting hubris”
Institutions that hold several such concentrated portfolios, thereby diversifying, might find instead they suffer from other forms of correlation – in terms of stock size (large cap) and style (quality or growth).
They will also find that the higher fees charged by concentrated active portfolios add up and don’t average down.
Most interestingly concentration “underweights luck” – that term most fund managers have pushed deep into their subconscious.
