Big Tech Stocks Plunge as AI Cost Pressures Weigh Heavily on Wall Street

On October 30, 2026, the US stock market witnessed a widespread sell-off causing Big Tech stocks to plunge, driven by mounting concerns over surging artificial intelligence (AI) capital expenditures that have yet to yield commensurate returns^1,4. The downward trend of major tech conglomerates such as Alphabet, Intel, and Amazon pulled the Nasdaq Composite down by 1.4% during Thursday's session and continued to drop over 2.5% at the start of Friday's session, hitting its lowest level in more than two months^1,4,5. This wave of capital withdrawal occurred despite AI revenue still recording growth¹.

Photo: P20220909AS-0624 (52517539215) – The White House, Public domain, via Wikimedia Commons.

The sell-off causes a widespread plunge in Big Tech stocks

The epicenter of the sell-off was Alphabet, Google's parent company. According to CNN, as cited by VnExpress, Alphabet's stock dropped 13% during Thursday's session, erasing $500 billion in market capitalization—the second-largest single-day loss in Wall Street history, trailing only Nvidia's $593 billion drop in January². Meanwhile, the South China Morning Post recorded an official session drop of 12.6%¹, and CNBC reported that the stock continued to decline during Friday's session⁵.

Photo: Frankfurt Stock Exchange (Ank Kumar) 03 – Ank Kumar, CC BY-SA 4.0, via Wikimedia Commons.

Alphabet's record decline caused co-founders Larry Page and Sergey Brin to lose a combined $60 billion in wealth in a single day². Forbes recorded Larry Page's net worth dropping by $31.5 billion to $235.9 billion, while Sergey Brin lost $28.9 billion to $217.2 billion². Other tech billionaires also suffered heavy losses: Amazon founder Jeff Bezos lost $9.6 billion, Tesla CEO Elon Musk lost $7.2 billion, and Dell Technologies CEO Michael Dell declined by $6.5 billion².

At Amazon, share prices registered a 7.3% decline according to the South China Morning Post¹, or dropped up to 6% before narrowing losses to about 1% to 1.6% during Friday's session as reported by CNBC and BBC^4,5. The sell-off also spilled over into the semiconductor sector, with Nvidia shares falling 4%, Broadcom dropping about 6%, and Qualcomm tumbling 12%⁵. Social media stock Reddit fell 26% after warning that Google's AI-powered search features are impacting referral traffic, while the platform Roblox dropped nearly 20% due to declining user counts⁴.

The burden of AI costs and negative cash flow pressure

The Q3 2026 financial reports exposed the difficult economic equation of the AI race, as hyperscalers must spend tens of billions of dollars building computing capacity before these assets have time to generate profits¹.

Photo: BalticServers data center – BalticServers.com, CC BY-SA 3.0, via Wikimedia Commons.

According to the earnings report ending in September 2026, Alphabet's cash flow plunged to a negative $9.1 billion as the company accelerated AI spending to over $50 billion during this period². The Financial Times noted that this is only the second quarter Alphabet has recorded negative cash flow since going public in 2004². Although operating income rose 30% to $40.6 billion, this figure still fell short of Wall Street's $43.2 billion forecast as core search advertising growth slowed². The BBC reported that Alphabet confirmed AI summary features have negatively impacted search ad revenue⁴.

The situation of spending more than taking in also appeared at Amazon. The conglomerate's report showed that spending levels increased sixfold within three months⁴. CNBC reported that Amazon continued to record negative free cash flow for the second consecutive quarter while maintaining its full-year 2026 capital expenditure (capex) plan at $220 billion⁵.

Commenting on these developments, Chris Low from investment management firm FHN Financial stated that companies like Amazon and Google are exhibiting clear growth headwinds in the process of building AI infrastructure, raising concerns that the entire sector could slow down⁴. Conversely, Matt Orton, chief market strategist at Raymond James, stated on CNBC that this is not necessarily a time for judgment, but rather a time for investors to reassess the overly high capital concentration in this group of stocks even though fundamentals remain intact⁵.

Weakening PC market forecasts and Intel's manufacturing hurdles

Intel recorded the heaviest losses within the hardware group. The chipmaker's stock dropped about 23% in Thursday's after-hours session¹ and plunged 29% on Friday—the company's worst day since 1974 according to CNBC⁵, or dropped as much as 30% according to the BBC, putting the company at risk of losing over $130 billion in market value⁴. Analytical firm D.A. Davidson downgraded Intel stock from a buy to a neutral rating⁵.

Photo: Google (5879010443) – nathanmac87, CC BY 2.0, via Wikimedia Commons.

Intel's decline stemmed from disappointing business results and a gloomy forecast. Intel Chief Financial Officer David Zinsner announced that the company expects not to recoup enough cash compared to the amount spent this year⁴. He stated:

"Looking ahead, we see the downturn in the PC market persisting through at least the first half of next year"^4,5.

According to Counterpoint Research, global personal computer shipments in the second quarter fell 4% year-over-year due to soaring memory and component costs⁵. Intel projected adjusted earnings per share for the quarter at 25 cents on revenue of $15 billion to $16 billion, lower than analysts' estimates of 43 cents and $17.1 billion according to LSEG⁵.

Alongside general industry headwinds in the PC sector, Intel was heavily impacted by an explosion at its Israeli plant that killed two workers and severely injured one, disrupting 10-nanometer chip production and expected to cause approximately $600 million in revenue losses over two quarters⁵. Although CEO Lip-Bu Tan stated that the new Arizona factory has begun mass production of the 18A process chips, Intel has yet to announce any external commercial customers for its new product line⁵.

Vizy's take

According to Vizy, the current sell-off does not reflect the technological failure of AI, but rather a necessary correction in investors' financial expectations. Negative free cash flow figures at Alphabet or a sixfold increase in spending at Amazon are clear proof that the operating costs and infrastructure construction of AI are far outpacing actual return speeds. As AI solutions like search summary features begin to inversely impact traditional revenue sources, Big Tech's business model transformation will face mounting pressure in the coming quarters.

For the Vietnamese market, Vizy believes this downturn offers an important lesson in technology resource allocation for domestic enterprises. Tech companies and digital transformation businesses in Vietnam should not rush into the capital-intensive race of building foundational models like US hyperscalers. Instead, focusing on operational cost optimization and practical applied AI layers to solve specific business problems will likely be the path that yields more sustainable and safer cash flow efficiency.

Sources

1. South China Morning Post – Amid brutal sell-off, what comes next for Google, Amazon and other Big Tech titans? (2026-10-30)
2. VnExpress International – Google co-founders world’s biggest wealth losers on Alphabet stock’s worst day ever (2026-10-30)
3. The Verge – Google’s latest Nest Learning Thermostat is $60 off just in time for sweater weather (2026-10-30)
4. BBC News – US tech stocks see sharp falls over AI cost fears (Fri, 30 Oc)
5. CNBC – Intel heads for worst day on Wall Street in more than 50 years on weak guidance (2026-10-30)

Compiled and analysed by Vizy from the sources above and reviewed by a Bống Media editor before publication. "Vizy's take" is the author's own opinion. For information only, not investment advice.