Si sabes lo que estás haciendo, como se le presupone a FGP la concentración es una clara ventaja. Además, que su FI seguro que tiene unos 20-30 valores, que ya es diversificación más que suficiente. El riesgo no viene por tener más o menos posiciones, sino porque estas sean las incorrectas y estén mal analizadas. Otra cosa es que, por la concentración, pueda darse una mayor volatilidad.
Cito algunas frases:
“Diversification is a protection against ignorance. It makes very little sense for those who know what they’re doing.” "A lot of great fortunes in the world have been made by owning a single wonderful business. If you understand the business, you don't need to own very many of them"
Warren Buffett
“A well-diversified portfolio needs just four stocks” "The idea of excessive diversification is madness" Charlie Munger
“The number of securities that should be owned to reduce portfolio risk is not great; as few as ten to fifteen holdings usually suffice.”
Seth Klarman