The symmetry of the 4x25 PP actually does have a very special property that any other allocation doesn't have: it minimizes your maximum possible loss if one of the four assets completely tanks. (In mathematics, they even have a name for minimizing your maximum possible loss: minimax.)ochotona wrote:Why do people keep saying this? Yes, any fixed percentage allocation plan is agnostic about the future. But any fixed percentage choice is in some way biased, or a wilda** guess, or based on past irrelevant information or something. I think people get misled about the symmetry of the original PP allocation. Symmetry doesn't mean anything. It's just coincidence, or a deliberate simplification; it's not magic.madbean wrote: The thing about 25/25/25/25 is that it is completely agnostic about the future.
Craig has aptly referred to this property of the 4x25 PP in his article "A Portfolio With Firewalls."