The Wire

This is the week that decides whether the AI trade has legs or just momentum.

Four of the Magnificent Seven report after the close on Wednesday. Microsoft, Meta, Alphabet, and Amazon. Apple follows Thursday. Combined, these five companies represent over a quarter of the S&P 500 by weight. A miss from any one of them can drag the entire index.

But the real number to watch isn't earnings per share. It's capex.

These four hyperscalers have collectively guided to roughly $670 billion in AI infrastructure spending for 2026. That's up from about $411 billion last year. Microsoft alone spent nearly $30 billion last quarter, up 89% year over year. Meta is guiding $115 to $135 billion. Alphabet $175 to $185 billion. Amazon around $200 billion.

The question is simple. Is that spending producing revenue or just burning cash faster?

The timing is brutal. OpenAI just missed its own revenue targets. AI infrastructure stocks got hammered on Tuesday. And for the first time since the AI boom started, the Mag 7 minus Nvidia are growing earnings slower than the other 493 stocks in the S&P 500. FactSet has the ex-Nvidia Mag 7 at 6.4% earnings growth this quarter. The rest of the index is at 10.1%. The growth premium that justified these valuations is gone.

Cloud growth rates will tell the story. Street consensus has Azure around 38%, Google Cloud around 48%, and AWS near 24%. If those numbers hold or accelerate, the capex narrative survives. If they slip, the entire AI supply chain reprices. Nvidia doesn't report until May but its stock will move on whatever these four say about server orders and depreciation schedules.

The ad business matters too. Meta and Alphabet face tougher comps this quarter, and ad buyers have flagged softer pacing in April. If ad revenue decelerates while capex stays elevated, the margin squeeze gets real.

Apple is the odd one out. It's not an AI capex story. It's a durability story. Services growth and China demand are the tells. The stock is down about 2% year to date and trading at 28 times forward earnings. Not cheap for a company that needs to prove it still deserves a premium in a market rewarding direct AI exposure.

By Friday morning, we'll know whether $670 billion in AI spending is an investment or a liability. Price accordingly.