Microsoft loses a massive $440 billion in market cap as shares tank — investors get increasingly sceptical of its AI strategy

Satya Nadella .

Microsoft's stock just achieved an unsettling milestone.

Microsoft can now claim to have experienced the second-largest single day stock decline in history, wiping an absurd $440 billion in market value from the tech giant. The drop is only behind that of NVIDIA from last year, who experienced a similarly deep shock when China's efficient DeepSeek AI model implied that you didn't need as much NVIDIA tech to have a capable chatbot as previously thought.