More than half of the world's market cap now sits outside the United States, and the largest IPO in history now belongs to a Chinese bank, ICBC. This distinction could be temporary, depending on how Japan proceeds with its postal savings bank. Either way, it means that many of the world's most established and dynamic growth opportunities are not found in American companies.

Scouring the globe for value
Successful international investing requires many of the same skills required to evaluate a U.S. company. But in addition to understanding the fundamentals of a business, international investing requires understanding some of the things we take for granted here in the U.S., because we live and breathe them. These factors include the economic policy, political currents, corporate governance, accounting standards, and cultural factors that are at work in different countries. In our recently launched Motley Fool Global Gains service, we take these factors and others into account to scour the planet in search of the most attractive opportunities for subscribers.

I don't have a handful of thoroughly researched ideas to offer you here, but I'm having fun mining our new Motley Fool CAPS service to see what other investors are thinking. CAPS, in case you're wondering, is a community-intelligence database that asks investors to rate stocks. In turn, every investor is ranked, as is every stock. As more people participate and more time passes, we hope to be able to determine the best investor and the best stock in America, and potentially, the world. Admittedly, we'll have to roll this thing out of beta testing before we can start talking about global domination.

Six all-star foreign companies
The following three stocks all have earned recommendations from at least 10 CAPS participants, have a P/E ratio below 20, possess a market cap of more than $10 billion, and are rated with five stars -- the highest possible -- in the CAPS community. As you'll see, there are some very recognizable names on the list.

Company

P/E

Market Cap

Novartis (NYSE:NVS)

18.7

$135.1 billion

Unilever (NYSE:UL)

19.4

$86.1 billion

Canon (NYSE:CAJ)

18.5

$72.3 billion

And the following three companies have all the same qualities as those above, except that they have market caps of less than $5 billion. As you might expect, these companies aren't exactly household names.

Company

P/E

Market Cap

Companhia de Saneamento Basico do Estado de Sao Paulo (NYSE:SBS)

9.0

$3.9 billion

Northgate Minerals (NYSE:NXG)

7.3

$886.9 million

TBS International (NASDAQ:TBSI)

8.6

$327.2 million

In CAPS, you'll also find ratings on all of the exchange-traded funds that track the markets around the globe. In some cases, it's easiest to gain exposure to the German economy, for example, with the iShares MSCI Germany Index (NYSE:EWG) ETF. 

When you go digging for the world's best stock ideas in a volatile market, it's still crucial to do your due diligence. If you'd like to get started doing just that, come and see what our CAPS investors are actually saying about these companies. To do so, just follow the link to join the free CAPS community today.

Nathan Parmelee is a contributing analyst to Global Gains. He's ranked 81st out of 25,251 investors in CAPS. Unilever is a Motley Fool Income Investor selection. At the time of publication, Nathan had no financial interest in any of the companies mentioned. The Motley Fool has an ironclad disclosure policy.