Alphabet's $15B capex hike triggered a tech sell-off hitting Microsoft, Meta, Amazon. Big Tech's combined AI spending now tops $700B for 2026.

Investors closely watch whether soaring AI investments by U.S. tech giants generate enough revenue to offset mounting capital spending and pressure on free...

America's biggest technology companies are beginning to generate meaningful AI-driven revenue, but surging infrastructure spending is putting free cash flow under pressure.…