I'm just interested in how seeing some backup to the for every loser there is a winner statement. I can't see how it can be true thats my point. Its possible but its unlikely. Massive stockmarket crashes happen and i am referring to say black monday
http://en.wikipedia.org/wiki/Black_Monday_(1987) where such massive amounts get wiped in a super short period its impossible to win.
As soon as you look longer term then yes its easier to beat the market but thats not the same thing.
Holding a diverse portfolio helps to spread the risk (its why pension schemes etc do it) but its not specific cover against one part falling in value.
Its basically impossible to cover all angles in all investments, if it was that easy inventment wrappers would always contain said balance and would hence never lose value, they lose money regularly)
Simplify it, say I own an icecream van, I may make £1000 if the weather is hot, however if its cold I will make £0. I could buy a soup van which would make £1000 if its cold but £0 if its hot. If I bought 50% of each I would expect one to make £500 which is spreading my risk. I won't get £1000 from either, but I won't get £0 either. Investment spreading is trying to achieve this by ensuring that within a portfolio you have a balance of items that will likely show opposite results in a bad time (or extreme in a certain way) and hopefully all do ok in the good times.
I am trying to vastly simplify here just to make a point. When the global stock exchanges lose massive values there is not necessarily a significant nor immediate impact to make say precious metals leap in value, there is not that perfect a correlation hence me objecting to the statement there is a winner for every loser.