Shares of chipmaker Monolithic Power Systems (NASDAQ: MPWR) rallied on Friday despite a down day for the markets, up 7.3% as of 1:30 p.m. ET.

Monolithic held its fourth-quarter earnings call last night, beating expectations and delivering better-than-expected guidance. The stock had also fallen into the end of the year based on fears of share losses in Nvidia's Blackwell product line, so it was perhaps primed for a bounce back.

In the fourth quarter, Monolithic's revenue grew 36.9% year over year to $621.7 million, while non-GAAP (adjusted) earnings per share was up 42% to $4.09. Management also guided for between $610 million and $630 million in first-quarter revenue, above the average estimate of $578.1 million.

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Source Fool.com