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Aging tech giants are suddenly enjoying youthful stock gains. Microsoft is up 39% over the past year; Xerox , 33%; and Western Digital , 78%. That compares with a 21% gain for the Standard & Poor’s 500.

Screen Shot 2014-03-27 at 12.20.45 PMHewlett-Packard (ticker: HPQ) stands out, not just for its 46% rise over the past year, but for its valuation, which remains humble. At 8.7 times projected earnings for the next four quarters, it trades at a 44% discount to the market. By comparison, Xerox (XRX), at close to 10 times earnings, could almost be mistaken for a glamour stock.

“We’ve reignited innovation while aligning our cost base,” says Meg Whitman, now in her third year as CEO. “But there is still more to do.”

mpsEye_animGIF_300x250_UKThere’s much to like about HP’s recent results: Costs are down, debt has been slashed, and free cash flow is plentiful. There’s also much to worry about: Personal computers and printers are in long-term decline; competition in servers is fierce; and overall revenue is slipping, albeit at a slowing pace. On the whole, HP seems poised for further improvement—and could even return to revenue growth in coming quarters. Shares, recently $32.64, are priced for 20% more upside over the next year. They pay a 1.8% dividend yield.

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