One of the most valuable commodities in the world is water -- without it, mankind can't survive. While more than 70% of the Earth's surface is covered by water, but 97% of it is saltwater and only 1% of the remaining 3% is readily available for consumption. Water is becoming scarce, and upcoming water shortages are emerging as the population of the world increases, particularly in emerging markets like China, India, and Mexico.

A great way to include water as part of your portfolio's commodity allocation is by buying an exchange-traded fund (ETF). An ETF is a basket of stocks that allow you to invest in a single asset class, sector, country, or theme with one stock. In one ETF, you'll own not only water utility companies but also related businesses, like those that help build the infrastructure for making water suitable for drinking. You won't have to pick a single stock, rather you can own the most important stocks in the water industry -- worldwide. ETFs are perfect building blocks for building a diversified portfolio using an asset allocation strategy.

Biotechs are fascinating. They have such great promise, yet very few of them actually turn those promises into money. Cures for all types of cancers always seem imminent with promising (there's that word again) results from mice or small control groups. Phase I testing is completed and all kinds of good stuff seems possible. Then something usually happens. Usually not very good things.

Most of the time, it's discovered that what works in mice doesn't work in men (or women). Or that the group was too small for meaningful data and when a larger group is studied, the efficacy isn't there. Or as soon as there's a bounce in the stock price, much more stock is issued and dilution occurs.

There's an old saying: "He who hesitates is lost." This is one of the best rules to use when investing.

Professor Lasse H. Pedersen of New York University wrote a book on the liquidity crisis titled When Everyone Runs for the Exit. He uses a poker analogy in which the player who has decided to either fold early or stay in for the kill makes the most money. The player who hesitates loses the most money.

Late yesterday, MetLife (NYSE: MET) announced a second-quarter net loss of $1.74 per share, compared to earnings of $1.26 per share a year ago. The company blamed the loss on derivative losses of $1.8 billion, $1 billion of which was related to an increase in the company's own debt in the second quarter. Excluding charges, MET earned 88 cents per share for the quarter, topping the consensus estimate by 20 cents. The insurer's premiums, fees, and other revenue increased 4% to $8.38 billion thanks to a record amount of money spent in variable annuity products.

Variable annuities can be described as a contract between the purchaser and the insurance company. The insurer agrees to make payments to the purchaser either immediately or at a future date. Investment options for variable annuities are usually a mutual fund that invests in stocks, bonds, money market instruments, or a combination of the three.

Inflation. Everybody agrees it's coming back. Make that roaring back. No one says otherwise. After all, the government is spending money like it's someone else's (it is ... ours). With extreme stimulus, surely inflation will have to be a problem, commodity prices have to rise, real estate has to go up, too much money will chase too few goods and services. That's the classic definition of inflation.

It's obvious what investors have to do: they have to buy inflation-proof investments, such as gold, commodities and real estate. Maybe it's too obvious. Maybe if everyone else is buying those things, there's reason to pause and reconsider.

Texas billionaire R. Allen Stanford pleaded 'not guilty' today in a federal court arraignment to charges that he ran a $7 billion Ponzi scheme. Not only is Stanford being charged with running the Ponzi scheme, there are also allegations that he paid $100,000 to Leroy King, the former chief executive officer of Antigua's Financial Services Regulatory Commission.

This day has been coming for a while. It seems as though the government has been looking into Stanford's investment company since 2005, but it was only this past February that they shut down the Houston office of his investment company, Stanford Financial Group.

On Monday the Dow Jones Industrial Average dropped more than 200 points before closing a little better. No real reason for it. Pundits suggested the drop in commodity prices (oil and gold were down a little, not enough to comment on) were the reason for the dip, suggesting the economy may not be as robust nor inflation as big a problem as thought on the Friday before.

But here's the real scoop: the market has rallied well beyond a level where economic numbers justify.

The stock market, as measured by the Dow Jones Industrial Average, sharply rebounded from its low of 6440 in March of this year. Currently, as this is written, the notable index is hovering around 8400. That's an increase of 30%. Not bad for two months of trading. While the average is made up of only 30 stocks, those 30 stocks are some of the best. There are also some real losers, such as General Motors (NYSE: GM) and Citigroup (NYSE: C). But for the most part, the index contains the strongest industries with some of the strongest stocks. With that kind of recovery already in place, is it too late to buy stocks or is this just the start of a major rally?

With President Obama at the helm it seems as though the light might be shining on the economic horizon. If you're of this opinion then now might be a good time to invest some of your hard earned savings in the banking industry.

But what banking firm do you decide to go with? Rather than selecting just one bank, how about hedging your bets by investing in many diverse banks from all over the country? An exchange traded fund (ETF) is a great way to do just that. By investing in the ETF PowerShares Dynamic Banking (PJB) you get shares of several different banks. PJB seeks to replicate the Dynamic Banking Intellidex index and invests at least 90% of assets in common stocks that comprise that index. Among their holdings in the PJB ETF are BancFirst Corporation(NASDAQ GS: BANF) BancFirst's holding company, Capital Federal Financial(NASDAQ GS: CFFN) the holding company for Capitol Federal Savings Bank, and Northern Trust Corporation(NASDAQ GS: NTRS) Northern Trust Company's holding company.

Most CEOs expect things to get worse. Chief Executive Officers of major U.S. corporations were more pessimistic than three months ago about their business and the economy over the next six months, the Business Roundtable reported last Tuesday. The CEO confidence index fell to negative 5.0 in the first quarter from 16.8 in the fourth quarter. It was at 79.5 a year ago. The CEOs expect the economy to contract 1.9% in 2009. Over the next six months, about two-thirds of CEOs expect lower sales, lower capital spending and fewer jobs at their company. About a quarter expect sales to rise in the next six months, while less than 10% expect to increase hiring or capital spending.