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Keurig, Inc.

Investing: Top stocks of the 21st century

Physics tells us that bodies in motion tend to stay in motion. Likewise, some winning stocks just keep on going. And the ones that have excelled through the early years of the 21st century have withstood two of the worst bear markets in history. To see which businesses worked best in the new millennium -- and to judge their potential now -- we looked at the biggest-gaining U.S. stocks from December 31, 1999, through February 18. Profiles of the top three are below. And with each summary, we offer our opinion about whether you should buy, sell or hold. --Monster Beverage (symbol MNST; recent price, $120; cumulative return, 44,510 percent). Monster Beverage was the hottest stock of the...