Google shares tumble as AI search tool threatens advertising revenue

Alphabet Inc. faced a sharp market correction as investors reassessed the company's financial prospects following revelations about the impact of its AI search summaries on advertising revenue. The disclosure prompted a significant sell-off, driving the stock to its lowest point in half a year and erasing hundreds of billions of dollars in market capitalization.

The core concern centers on how Google's generative AI feature—which provides direct answers to search queries through summary text—reduces the number of traditional search result clicks that generate advertising revenue. This cannibalization effect represents a potential structural challenge to the business model that has historically driven Alphabet's profitability.

The sharp market reaction underscores growing anxiety among investors about how leading technology companies will navigate the transition to AI-driven services without undermining their core revenue streams. For Google, the challenge is particularly acute given the advertising industry's dependence on search-driven clicks and impressions.

Analysts have flagged the tension between Alphabet's push to remain competitive in generative AI and the risk of cannibalizing its most profitable business segment. The company now faces pressure to demonstrate how it plans to monetize AI-powered search while protecting its traditional advertising platform.