Sadly, there's no such thing as an ultimate buy signal when it comes to investing in stocks. Identifying companies with the wind at their back takes time, patience, and a good dose of due diligence.

There is, however, an easy way to increase your odds of finding the stocks that will beat the market. At Motley Fool CAPS, the Fool's investing community of more than 110,000 members, we've found that five-star stocks, as a group, substantially outperform the broader market -- to the tune of 12 percentage points on an annualized basis from November 2006 to July 2008.

In order to fully capture the upside potential of those five-star stocks, it makes sense to identify them just as soon as they achieve five-star status. Fortunately, our CAPS screener now makes it possible to do this. Below, for example, is a list of companies that have been upgraded to five-star status from four stars just one month ago. These stock ideas are only a starting point, of course. Be sure to join us on CAPS to dig in even further.

Company

All-Stars Saying Outperform

Research

Autodesk (NASDAQ:ADSK)

138 of 139

Research

Cal-Maine Foods (NASDAQ:CALM)

179 of 183

Research

ChinaMobile (NYSE:CHL)

796 of 821

Research

CNOOC (NYSE:CEO)

355 of 368

Research

Hologic (NASDAQ:HOLX)

169 of 171

Research

Johnson Controls (JCI)

201 of 210

Research

UnitedHealth Group (NYSE:UNH)

661 of 683

Research

Data from Motley Fool CAPS as of Aug. 1, 2008.

Come join us on CAPS to learn more about these and countless other interesting stock ideas. Click here for a free sign-up.

Ilan Moscovitz doesn’t own shares of any companies mentioned in this article. CNOOC is a Global Gains recommendation. UnitedHealth Group is a Stock Advisor and Inside Value pick. You can learn more about The Motley Fool’s disclosure policy here.