Zuckerberg loses $11 billion in a day as Meta shares slide

Mark Zuckerberg's estimated fortune fell by roughly $11 billion on Monday as Meta shares declined. Investors are increasingly questioning whether the company's massive spending on AI infrastructure, chips and data centers will generate enough revenue to justify the costs.

• Zuckerberg lost about $11 billion in a day as Meta stock dropped
• Investors doubt Meta's AI spending on chips and data centers will pay off
• Meta is pushing its Muse AI assistant and a new enterprise AI division
• Advertising on Facebook and Instagram remains Meta's core revenue