Amazon (NASDAQ:AMZN) and Microsoft (NASDAQ:MSFT) both filed earnings on April 29, 2026, framing two different bets on the AI buildout. Amazon leans on custom silicon and, per a $25 billion multi-tranche bond sale, to fund infrastructure. Microsoft leans on its OpenAI stake and contracted backlog. Same tailwind, different balance sheets. AWS Reaccelerates While Azure Sprints ... Amazon Vs. Microsoft: What Amazon’s $25 Billion Bond Tranche Says About Mag 7 Competition