In this video from Tuesday's Where the Money Is as part of the Motley Fool's "Ask a Fool" series, Fool banking analysts Matt Koppenheffer and David Hanson take a question from a Fool reader, who asks, "If the U.S. has a debt of $17 trillion how can a rising stock market ever be anything more than shuffling the deck chairs on the Titanic?"

Matt discusses that although the national debt number can seem frighteningly high, putting it in the perspective of historically low interest rates at the moment, combined with a growing economy, makes the U.S.'s ability to service that debt look much more optimistic. As well, from a historical perspective, the nation has faced debt-to-GDP ratios that were as high or even higher than current levels, and was able to pay down those debt levels while still growing the GDP year over year at a healthy rate.

Matt and David also look at the stock market, and note that investors shouldn't be making their investing decisions based on broader macroeconomic trends. Stock prices are based on the strength of the individual businesses on the market and analysts' expectations of those businesses, and examining the business should be the best place to turn to make informed stock investment decisions.

However, for those investors who are looking to diversify geographically away from the U.S., Matt gives three American companies that make a large percentage of their revenue internationally, whose stocks might be worth a look.

This article represents the opinion of the writer, who may disagree with the “official” recommendation position of a Motley Fool premium advisory service. We’re motley! Questioning an investing thesis -- even one of our own -- helps us all think critically about investing and make decisions that help us become smarter, happier, and richer.