Wednesday is the day the AI boom has to show its math. Microsoft and Alphabet report after the close, Amazon follows on Thursday, and the three carry nearly $1.7 trillion in backlog and plan to spend as much as $600 billion this year, according to Reuters. The open question is whether cloud growth can fund the spending spree without breaking the balance sheet.

The backdrop has turned hostile. Bond yields at AI cloud providers like CoreWeave are climbing, and insuring Meta's debt now costs a record amount. Ken Griffin is warning of an AI bubble, and China's tech-stock boom has unwound by about $480 billion. Meta showed the new math last week: strong revenue and an upbeat outlook, and its shares still fell nearly 7% the next day on spending plans alone.

Google Cloud is expected to lead with revenue up 95.1% to $29.57 billion, according to LSEG data. Amazon Web Services is expected to grow 38.2%, and Microsoft's Azure 47.7%. But the cash tells a different story: Alphabet and Amazon are expected to burn cash again, while Microsoft is likely to generate more than $8 billion. "The appetite for capital expenditure alone is slowing rapidly," Brian Mulberry, chief market strategist at Zacks Investment Management, told Reuters.

Microsoft's report has an extra twist. It's the first under a revamped structure that folds cloud, AI, and business software into a division called "Agents and Infra." Microsoft will also finally disclose Azure's actual quarterly revenue instead of just a growth rate — analysts expect $33.06 billion, powering a 16.7% rise in total revenue to $90.66 billion. The number arrives as spending behind it faces maximum scrutiny.

Alphabet has its own vulnerability: its cloud business and in-house chips are a bright spot, but personal AI agents and chatbots are raising questions about the search business behind its earnings. Search revenue growth is expected to slow to 14.7% from 16.8% last quarter, even as total revenue rises 25.2% to $128.18 billion.

The financing of the buildout has become the story itself this week: Meta is asking shareholders to fund $95 billion of it, Anthropic's IPO filing revealed $600 billion in obligations, and Microsoft is offering buyouts to 60,000 employees to help pay its own bill. Wednesday won't settle whether the boom is a bubble — but it will show whether the three companies at its center can grow fast enough to outrun their spending.

— via reuters