Alphabet Loses $500 Billion as AI Search Weakens Ad Monetization
Updated
Updated · The New Yorker · Nov 9
Alphabet Loses $500 Billion as AI Search Weakens Ad Monetization
3 articles · Updated · The New Yorker · Nov 9
Summary
Alphabet shares fell nearly 25% after Google said AI-powered search is generating lower monetization, wiping about $500 billion from the company in its biggest one-day market-value loss.
More than half of Google’s revenue comes from search ads, and AI overviews and chatbot-style answers can keep users from clicking through to external sites where those ads are most valuable.
OpenAI’s ChatGPT now handles about one-fifth of Google’s volume of search-like queries, while Menlo Ventures said Gemini’s share of business AI spending dropped to 9% in 2026 from 21% a year earlier.
Reddit said its search traffic fell by more than 1 million referrals a week in October, underscoring how AI search is diverting traffic from the open web and pushing sites toward more closed, logged-in experiences.