Bill Byrnes

Global diversification is an essential part of your investment strategy. Like every other investment, you need to do your homework and understand how much, and what, risk you're taking.

Exchange traded funds are index funds which have advantages over open-end index mutual funds. ETFs trade all day long on the stock exchanges, may be purchased through any broker, have lower fund expenses than mutual funds, and have less likelihood of generating unwanted taxable gains than mutual funds.

China, India and the other new economies also consume more energy each year. Political instability in Nigeria, Iran, and Venezuela could limit supply. And, there's only so much oil (natural gas and coal) in the ground. I'm not suggesting we'll run out but it will become more expensive to extract it.