Tema: ¿Por qué la bolsa siempre sube?

Survivorship Bias

What is 'Survivorship Bias'
Survivorship bias is the tendency for mutual funds with poor performance to be dropped by mutual fund companies, generally because of poor results or low asset accumulation. This phenomenon, which is widespread in the fund industry, results in an overestimation of the past returns of mutual funds.


For example, a mutual fund company's selection of funds today will include only those that have been successful in the past. Many losing funds are closed and merged into other funds to hide poor performance. This is an important issue to take into account when analyzing past performance.


En bolsia estamos para batir a los índices, yo iré mejorando la web... pero veréis como lo logramos porque simplemente NO VOY A TENER LA PRESIÓN DE UN GESTOR, el método funciona si un índice de unas cuantas acciones lo hace mejor que un Gestor ¿Por qué no un índice de los 25 mejores gestores de 3000 o más? eso es bolsia, y por eso los fondos funcionan.

Un Saludo.