Live Markets-Mag 7 Investors Look for AI Spending Discipline

Wall Street got a jolt on Thursday after earnings from Alphabet GOOGL.O and Tesla TSLA.O revived concerns about AI spending and the durability of Big Tech's growth. The Magnificent Seven ETF MAGS.K suffered its steepest one-day drop since April 2025, while the Nasdaq Composite .IXIC fell more than 2%.

Markets have stabilized somewhat on Friday, but investors' attention is already shifting to next week's results from Microsoft MSFT.O, Meta Platforms META.O and Amazon AMZN.O.

According to Mike O'Rourke, chief market strategist at JonesTrading, the key issue isn't just earnings. It's whether management teams signal a more measured approach to AI investment after Alphabet's pledge to keep spending aggressively despite an increasingly uncertain competitive landscape.

"The expectation is that lessons will be learned from Google's mistake of blindly marching forward and promising to invest hundreds of billions of dollars in a highly uncertain environment," O'Rourke wrote in a note late Thursday.

His argument is straightforward: no one can credibly say today which company will have the most capable or cost-efficient AI model six, 12 or 18 months from now. Yet spending continues to accelerate.

That has investors questioning whether the Magnificent Seven are evolving from asset-light cash-generating machines into capital-intensive businesses that consume increasing amounts of free cash flow. If so, O'Rourke believes valuation multiples could continue to come under pressure.