AI pressure on the search business

The decline reflects investor concern that AI-based search and chatbot services are encroaching on Google's dominant search advertising revenue, the company's principal profit engine. The 13 percent drop, which translated into the loss of approximately 770 trillion won in market value, came amid a broader market reassessment of how generative AI is changing user behavior away from traditional keyword search.

The pace and extent of any actual revenue erosion from AI competition remain subject to uncertainty, as Alphabet has not disclosed figures quantifying such an impact. The claim's characterization of the stock move and market capitalization loss is consistent with the reported figures, but the causal link between AI search competition and the full extent of the decline cannot be fully established from available information.

What remains unclear

While the share price fall and the magnitude of the market value loss are the reported outcome, questions persist over how much of the selloff stems directly from AI-related fears versus broader market conditions. Investors will be watching Alphabet's upcoming disclosures for evidence of whether AI is measurably cutting into search ad revenue.

Taken together, the reported stock decline and market value loss are supported by the figures, but the framing of AI search erosion as the sole cause leaves room for doubt — the claim is Partly True.