John Reese is chief executive officer of Validea.com and Validea Capital, the manager of an actively managed ETF. Globe Investor has a distribution agreement with Validea.ca, a premium Canadian stock screen service.

Warren Buffett continues to feel the weight of nearly $100-billion (U.S.) in cash on Berkshire Hathaway's balance sheet – not an ideal situation for a guy who always wants dollars to be working for the shareholders. But this legendary investor didn't get to where he is by acting hastily or impulsively. He has made a long and successful career of looking before he leaps.

What exactly does "looking" involve for Warren Buffett, arguably the most famous investor of all time?

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The Buffett-based stock-screening model I've developed attempts to answer that question (validea.com/warren-buffett).

Based on the approach Mr. Buffett reportedly used to build his fortune (based on the book Buffettology, co-written by Mary Buffett), my model tries to use the same conservative, stringent criteria to choose stocks that this investor uses to evaluate businesses. Mr. Buffett's strategy incorporates both qualitative and quantitative tests to identify fundamentally sound companies.

Qualitative factors

On the qualitative side, he likes to invest in businesses that have:

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Quantitative tests as evidence of qualitative strength

While strong management and durable competitive advantage are considered qualitative criteria that are therefore subjective in nature, Buffettology outlines a number of seemingly corresponding quantitative tests that, in essence, capture the qualitative factors Mr. Buffett and his generals at Berkshire Hathaway are searching for. These include the following:

There are many other factors included in the Buffett model I run, including whether or not a stock is trading at a reasonable and attractive price. But next time you hear about the qualitative side of investing, remember that many of these ideas can be captured quantitatively.