The global recovery is underway, and that's goods news for Cummins, Inc. (NYSE: CMI), which is why reiterating my Buy rating for the company's shares, first recommended on April 3, 2009 at a price of $29.70. If you bought CMI in April, you're up an impressive 57%.

Look for Cummins, with more than 50% of its revenue derived from international markets, to register an impressive FY2010 revenue gain, on sales gains of its efficient truck engine and infrastructure-based power generation equipment. Basically, institutional investors (IIs) have looked beyond CMI's FY2009 revenue decline, and have bid-up the company's shares since March, on the U.S./global economic recoveries.

To say the least, this has been one interesting and turbulent week for the stock market. We saw international markets crash for two days, severe down action, a three-quarter point emergency interest rate cut by the Fed, a $7 billion mistake in France and work on a rebate package in Congress.

It can be a little hard to understand international markets and how they all work. But allow me to use an analogy to explain their interaction.

We all grew up in a family, and one of the most important people in the family is Mom. Mom does a lot of work -- making meals, doing laundry, cleaning the house and even working outside of the house. Families can have very complicated interpersonal dynamics in them. There is a saying that "if Mama ain't happy ... nobody's happy." And I think there is some major truth to it.

But it applies to international markets as well. The U.S. market is the "mama" and the most important player. The $13 trillion U.S. economy is bigger, stronger and more dynamic than each of the other markets, and if it has troubles, other markets have troubles as well.