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Updated from 1:42 p.m.

Dell

(DELL)

ended up $3, or 13.5%, at $25.19 after the computer company reaffirmed its first-quarter forecast, offering a rare bit of good news and boosting tech-sector shares. The company still expects $8 billion in revenue and earnings of 17 cents per share, in line with analysts' estimates, but declined to forecast the remainder of the year.

Apple

(AAPL)

shares followed suit, rising 7%.