Is investing abroad because the U.S. is going through a rough patch a good idea? If so, why? What foreign markets are attractive? Investing abroad is a good idea -- but not because the U.S. is melting down. Instead, it turns out that emerging markets are outperforming developing ones because they are supplying the commodities that fuel demand for 10% annual growth in emerging markets like China and India.

Emerging markets are up 20% in the last year while developed markets like the U.S. are flat. The reason to invest in these markets is not so much because the U.S. is going through a rough patch but more because these other markets are doing so much better and they are going to continue to do well regardless of what happens in the U.S.

But the U.S.'s rough patch may not be as bad as people had thought. An economist at Wachovia Corp. (NYSE: WB) changed his estimate of the chances of a recession from 90% to 45%. So the U.S. may turn out to be a good place to invest if stocks are priced for a recession that doesn't happen.

Seems the world economy is growing and changing so fast that staying on top for very long will become harder. Carlos Slim of Mexico did not retain the title very long, as CNBC is reporting Meet the World's New 'Richest Person' -- For Now, a story about Mukesh Ambani. It has been reported that he is just completing a ONE BILLION DOLLAR HOME! Here's how the Indian press reports rank the world's top five richest people as of today, based on known public stock holdings:

• Mukesh Ambani - $63.2 billion
• Carlos Slim Helu - $62.2993 billion
• William (Bill) Gates - $62.29 billion
• Warren Buffett - $55.9 billion
• Lakshmi Mittal - $50.9 billion

To me, this all amounts to creating headlines, since the slight difference between one, two, and three could be altered with a single day's stock movement. Given that Ambani is on the other side of the world with great fortunes in Europe and Asia it could change back and forth depending on which stock exchanges are open at the time. In a rising market you could go to sleep as the richest person in the world and wake up to find you were overtaken, only to find by the close of the market you were on top again.

What's more important is who is taking what actions. What are these supernova rich guys doing with their wealth? In the case of Gates and Buffett, they have become the world's biggest philanthropists. Carlos Slim has expressed a desire to share his wealth as well by setting up a $10 billion foundation -- I'm not sure how far he has gone with that idea. Mittal is still busy buying up all the steel production on the planet, and is now the largest player in the market. That will increase his wealth for now. On the other hand, the Hunt Brothers of Texas thought that way in the 1970s about silver, and found out rather quickly that was not their brightest idea. Steel is likely a much better bet.