Amazon has seen its largest ever free cash flow loss after investing billions into its artificial intelligence and cloud infrastructure. It has resulted in Amazon reporting a negative free cash flow of $42.4 billion for the 12 months ending on September 2026, compared with a positive $14.8 billion in the same period last year. Amazon has invested in increasing its data centres and buying new equipment to meet increasing AI demand. This has helped to boost revenues of Amazon Web Services (AWS). Here is why Amazon is investing so much.