Here are my three favorite funds for playing the quality theme, along with a list of 16 pristine stocks. By Steven Goldberg, Contributing Columnist June 3, 2013 I've been singing the praises of high-quality stocks for years now. And I'm hardly their only fan. But do they really outperform? For the first time, some solid research addresses this question.See Also: 7 Great Stocks for the Long Term A study by the Leuthold Group found that high-quality stocks have beaten the overall stock market over more than 25 years. From 1986 through April 30, high-quality stocks returned an annualized 11.8%, compared with 10.2% for the overall stock market, according to the study, by Jun Zhu, a Leuthold analyst, and Eric Weigel, the Minneapolis firm's research director. (Leuthold's benchmark for the overall market was an index that gave equal weight to the nation's 1,500 largest companies.) What's more, high-quality stocks do best when the market is in free fall. Indeed, the outperformance of high-quality stocks is entirely due to their market-beating returns during bear markets. "High quality works when you really need it," Zhu says. Advertisement Look at the numbers. When the market, as represented by the Leuthold index, fell 11.6% from the start of May through August 2010, high-quality stocks lost only 8.9%. When the market plunged 52.6% from the start of November 2007 through February 2009, high-quality stocks lost 42.5%. Most strikingly, when the market plummeted 40.3% from March 2000 through September 2002, high-quality stocks gained 3.9%. Quality doesn't always excel. It tends to lag in bull markets. Indeed, lower-quality stocks and the overall stock market have done better in the current bull market. From March 1, 2009 (nine days before the bull market began) through April 30, high-quality stocks returned a cumulative 175% — eight percentage points less than the market. High-quality stocks did much worse, relatively, during the 2002-2007 bull market, returning a cumulative 125%, or 41 percentage points less than Leuthold's measure of the overall market. What's the outlook for quality now? It depends partly on your market view. In my opinion, global economic uncertainty remains high; I'm much more comfortable owning high-quality stocks than lower-quality fare. Weigel agrees. "It's probably worth emphasizing quality because the market seems a little bit toppy," he says. But what is high quality? To me, it's kind of like the late Supreme Court Justice Potter Stewart's famous definition of pornography: "I know it when I see it." Similarly, when I see Apple (symbol AAPL), Google (GOOG) and UnitedHealth Group (UNH), I know I'm looking at high-quality stocks. Advertisement Leuthold came up with solid criteria to identify high-quality stocks. First, they screened for companies generating stable and growing revenues. Then they looked for stable and growing earnings. They excluded companies with heavy debt loads. Next, they looked for companies that regularly raised their dividends. Finally, they screened for stocks with low price volatility. They kept their screen sector-neutral. So if, for example, technology stocks account for 15% of the market, 15% of Leuthold's high-quality stocks have to be tech stocks. That's one part of their research I disagree with. I think high-quality stocks can more readily be found in some sectors — such as health care and consumer products — than in others. I think it's particularly hard to find quality stocks among financials because they are so heavily leveraged — the ratio of lending to equity at banks is often huge—and they tend to go through cycles when they make terrible loans. I also think it's difficult to identify quality stocks among firms that make huge capital expenditures. That group includes most companies in basic materials, energy and industrials. Leuthold's research is aimed at investment professionals, so the high-quality screen is meant to be just one step in picking stocks. Leuthold's screen does not exclude stocks with high price-earnings ratios. So Amazon (AMZN) is considered a high-quality stock even though, at a price of $266 (as of the May 29 close), it's trading at 63 times analysts' earnings estimates for the next 12 months. "We're not saying you should buy high-quality stocks without further research," Weigel says. Advertisement Other stocks on Leuthold's high-quality list, with the highest quality first, include Comcast Class A (CMCSA), Starbucks (SBUX), Nike Class B (NKE), Wal-Mart Stores (WMT), CVS Caremark (CVS), Colgate-Palmolive (CL), Costco Wholesale (COST) and Walgreen (WAG). I generally associate high quality with large-capitalization stocks. But Leuthold's screen identified a bunch of small caps and midcaps, too. With highest quality first, they include Big Lots (BIG), Cheesecake Factory (CAKE), Vitamin Shoppe (VSI), Shutterfly (SFLY), Lancaster Colony (LANC), Boston Beer Class A (SAM) and J&J Snack Foods (JJSF). Or pick a fund that emphasizes high quality. My favorites are BBH Global Core Select N (BBGNX), Vanguard Dividend Growth (VDIGX) and Yacktman Fund (YACKX). These funds won't lead the pack in most bull markets. But they should hold up well in treacherous times. Steve Goldberg is an investment adviser in the Washington, D.C., area.