AI search shortfall tanks Alphabet

Alphabet’s Q3 results show AI‑mode searches monetize worse than traditional search even as overall search revenue rose, and the stock fell enough in one session to wipe roughly $524 billion of market value. The market reaction implies investors price AI not just as capability but as an economic product — disappointing unit economics can prompt extreme repricing of mega‑caps. — Shows that AI product monetization — not just capability hype — is now a binding political and economic variable with systemic market consequences.