A sign on the Microsoft campus in Redmond, Washington, US, October 26, 2026. REUTERS/David Ryder/ File Photo

(Corrects first paragraph to say Nvidia was the second most valuable company. Also corrects syntax in headline)

Nov 10 : Microsoft overtook Nvidia as the world's second-most valuable company on Tuesday, as the chip giant's shares fell on uncertainty over the outlook for AI and an investigation into whether Nvidia CEO Jensen Huang was the target of a foreign intelligence effort.

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