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The Express Gazette
Thursday, October 29, 2026

Alphabet's Market Value Plummets by Over $500 Billion Amid AI Spending Concerns

Google's parent company experiences one of Wall Street's largest single-day market cap drops as investors react to increased AI infrastructure costs and a slowdown in its core advertising business.

Business & Markets • 2 hours ago
Alphabet's Market Value Plummets by Over $500 Billion Amid AI Spending Concerns

Alphabet, the parent company of Google, saw its market value plummet by more than £400 billion ($500 billion) in a significant stock market downturn. The steep decline occurred during a turbulent trading session on Thursday, as investors expressed concerns over the company's substantial investments in Artificial Intelligence (AI) infrastructure, including data centers.

The nearly 14% drop in Alphabet's shares marked its worst-ever trading session and represented the second-largest daily loss in market value in Wall Street history, trailing only behind Nvidia's £450 billion slump in January of the previous year. The value shed is equivalent to the combined market capitalizations of major London-listed companies such as AstraZeneca, Rolls-Royce, and Unilever. Despite the significant drop, Alphabet's valuation remained around £2.5 trillion, still considerably higher than the UK stock market's largest company, Shell.

The sell-off in Alphabet's stock contributed to a nearly 2% fall in the tech-heavy Nasdaq index, amplifying fears that the recent AI-driven stock market boom could be nearing a collapse. The impact of this market movement is expected to be felt by numerous British savers through their exposure to the U.S. stock market via ISAs and pensions.

Investor strategists noted the significant impact of such a large drop on major indices, highlighting a shift in investor sentiment. "A drop this size blows a big hole in all the major indices, it's not a pretty picture. It shows that investors don't just want capex, they want to see the returns already," commented Neil Wilson, an investor strategist at Saxo.

The market reaction followed Alphabet's latest quarterly financial results. The company reported a 25% increase in revenue, reaching £95 billion for the three months ending in September. However, this figure fell short of Wall Street's expectations. Simultaneously, profits decreased by a quarter to £20 billion, largely attributed to an increase in AI-related spending, which approached £40 billion.

Further pressure on Alphabet's stock came from revelations about its core advertising business facing challenges due to the growing popularity of 'AI Mode,' a new chatbot service integrated into Google Search. The company is reportedly still in the experimental phase regarding advertisements within this new feature.

Analysts pointed to the softness in search performance as a critical factor. "The softer search performance is significant because it highlights the challenge of funding massive AI investments while maintaining the strength of established businesses," said Tracy Woo, principal analyst at Forrester.

Russ Mould, investment director at AJ Bell, elaborated on the market's unease. "Vast spending on AI seems to be tolerated by investors if companies’ earnings are unblemished. This is where Google-owner Alphabet has fallen down," Mould stated. He added that while overall revenue was strong, weakness in the core search advertising business, coupled with high spending rates, caused concern. Mould also noted that Google's chatbot-style AI mode appears to be impacting traditional search, and the deceleration in growth is a cause for disquiet. He concluded that the market's reaction indicates persistent doubts about the long-term viability of Alphabet's comprehensive strategy involving proprietary chips, data centers, and large language models.


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