It's called diversification. If there's a downturn in Europe, you want to be insulated against it, otherwise you'd then be out of funds right when you actually

It's called diversification. If there's a downturn in Europe, you want to be insulated against it, otherwise you'd then be out of funds right when you actually need them the most. It'd be like investing all your savings in your company stock. If the company falls into tough times and you get laid off, you'd be out of money exactly when you need it real bad.