Microsoft offers vital cloud services to AI customers through its Azure division - Thibault Camus/AP PhotoMicrosoft recorded the biggest one-day gain in stock market history after surging by $450bn. The company offers vital cloud services to AI customers through its Azure division, which posted a 30pc rise in sales. Microsoft's record-breaking rise came as Amazon also reported robust results, helping ease fears of a slowdown in the US tech sector. It came as Mark Zuckerberg's Meta lost more than $130bn (£97bn) in value after investors took fright at the pace of the company's heavy AI spending. However, investors have become nervous about the scale and speed of the tech giant's AI spending, which has so far not delivered a comparable boost to sales.