On September 23, Alphabet dropped 3.01% in regular trading to $336.75 per share, with turnover of $1.673 billion. The decline came amid fresh regulatory headwinds as the UK Competition and Markets Authority (CMA) unveiled proposals that could undermine Google's default search dominance.

The CMA proposed requiring Google to offer Android and Chrome users a choice of search services — including AI assistants — upon first use, followed by an annual prompt to reselect their default provider. The proposals reflect the rising adoption of AI-powered search tools such as ChatGPT and Perplexity. Public consultation runs through October 9, with a final decision expected by year-end.

The regulatory pressure compounds existing antitrust challenges. A US federal judge recently ruled that Google must relax its ad-tech bidding rules and appoint an internal antitrust compliance monitor, though stopped short of ordering a business breakup. Separately, Google and other AI giants face a new antitrust lawsuit alleging coordinated efforts to slow AI development, while EU regulators received a formal complaint targeting Google's AI Overviews feature for allegedly diverting publisher traffic.

Within the Interactive Media & Services sector, Meta Platforms rose 0.95%, while peers declined: Reddit fell 4.3%, Baidu dropped 3.56%, and Snap lost 4.89%.

(The above content is based on publicly available market information, generated by a program or algorithm, and is intended solely as a stock movement alert. It does not constitute investment advice or a basis for trading decisions.)