While the apostles of the new so-called "behavioral" theory present ample evidence of how often human beings make irrational financial decisions, it remains to be seen whether these decisions lead to predictable errors that create systematic mispricings upon which rational investors can readily and economically capitalize.
John C. BogleI think it's fairly easy to provide a moral defense of capitalism. It has been - over the last 200 years - the underlying basis for enormous increases in productivity and human welfare and rising living standards, particularly in the United States, and in the industrialized nations but in fact, in most parts of the world.
John C. BogleThe idea that a bell rings to signal when investors should get into or out of the stock market is simply not credible. After nearly fifty years in this business, I do not know of anybody who has done it successfully and consistently. I don't even know anybody who knows anybody who has done it successfully and consistently. Yet market timing appears to be increasingly embraced by mutual fund investors and the professional managers of fund portfolios alike.
John C. Bogle