Diversify your portfolio actions is particularly important in the current economic situation, as you never know what the next industry to be hit by the recession. The concept of portfolio diversification is very simple and only means that you do not put all your eggs in one basket so to speak. If you buy shares in an airline does not agree with another airline. Take a look at another sector as a whole. Think about it like this, when suddenly a sharp increaseoperating costs, such as jet fuel, ...