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Microsoft back as most valuable firm as Nvidia slips

The artificial intelligence chip giant briefly took the top spot from the software company this week.

Nvidia's rise has been fuelled by its dominance of what analysts call the "new gold or oil in the tech sector" - the chips that power AI. "We believe over the next year the race to $4 trillion market cap in tech will be front and centre between Nvidia, Apple, and Microsoft," Wedbush Securities said in a note earlier this week. Its rise as been mirrored by the growing profile of its boss, Jensen Huang, who has become well-known thanks in part to his popularity in his native Taiwan, where fans treat him like a rock star.

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