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Alphabet shares plunge 13% in worst day, $500bn wiped off value

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Neutral summary

Shares in Alphabet, Google's parent company, fell nearly 13% on Thursday, their worst day on record. More than $500bn was wiped off the company's market value, making it the second-largest one-day loss in market history after Nvidia's $593bn drop in January 2025. The trigger was third-quarter results that missed analyst estimates: revenue grew more slowly than expected, while spending on artificial intelligence topped $50bn in the quarter. The company also said its AI-powered search summaries were hurting advertising revenue. The sell-off spread across the tech sector: the Nasdaq Composite fell 2.2% on Friday, and futures were down as much as 2.3%. Amazon and Intel shares also tumbled after their earnings, with Intel losing about a quarter of its value. According to the Financial Times, big tech companies collectively lost nearly $900bn in market value. Investors are questioning whether the massive AI spending will pay off.

How it was framed

Outlets: 75. Countries: 22. Facts in the shared core: 5.

Publication timeline

  1. · CNBC (outlet profile)

    Here's what options traders see before Alphabet, Microsoft report after the bell. The market's mini rally faces a key test after the bell when tech giants Alphabet and Microsoft report.

  2. · CNBC (outlet profile)

    Alphabet set to report third-quarter earnings after the bell. Alphabet faces a skeptical Wall Street as it prepares to report quarterly results.

  3. · CNBC (outlet profile)

    Ford Motor is set to report earnings after the bell. Here's what Wall Street expects. Ford Motor is set to report third-quarter results after markets close Wednesday.

  4. · Valor Econômico (outlet profile)

    FT: Avanços matemáticos da IA aumentam temor sobre segurança da criptografia mundial. Os avanços na inteligência artificial ameaçam "quebrar" as ferramentas de criptografia usadas para proteger os dados digitais, o que…

  5. · Valor Economico (outlet profile)

    FT: Avanços matemáticos da IA aumentam temor sobre segurança da criptografia mundial. Os avanços na inteligência artificial ameaçam "quebrar" as ferramentas de criptografia usadas para proteger os dados digitais, o que…

  6. · Exame (outlet profile)

    Dona do Google amplia queima de caixa e lucro vem abaixo do esperado; ação cai 9%. Google Cloud cresce 103%, mas busca fica aquém e empresa recorre a dívida

  7. · Olhar Digital (outlet profile)

    ONU alerta para riscos do uso de IA na violência contra mulheres. A ONU alerta que a inteligência artificial pode ampliar a violência digital contra mulheres e pede regras para plataformas e sistemas O post ONU alerta p…

  8. · Variety (outlet profile)

    YouTube Q3 Ad Revenue Rises 9% to $11.2 Billion as Alphabet Misses Earnings Estimates. YouTube continued to vacuum up digital ad dollars in the third quarter of 2026, but the video platform grew at slower pace than rece…

  9. · The Hollywood Reporter (outlet profile)

    YouTube Premium and Music Subscribers Pass 150 Million as Ad Revenue Tops $11 Billion in Q3. The Google-owned video platform continues to see explosive growth.

  10. · Financial Times (outlet profile)

    Google shares drop 7% as search business falls short and AI spending surges. Search giant boosted spending on AI investments to more than $50bn in the quarter

  11. · The Verge (outlet profile)

    Google says its investments in AI are driving more searches. Google parent company Alphabet says that its AI investments are leading to a big growth in searches year-over-year, as noted in its Q3 2026 earnings today. "O…

  12. · Olhar Digital (outlet profile)

    Dona do Google fica abaixo das expectativas e acende alerta sobre gastos com IA. Receita da Alphabet cresceu 25% em um ano, mas ficou abaixo das projeções de analistas; investimentos em inteligência artificial preocupam…

  13. · Fortune (outlet profile)

    Alphabet’s Google Cloud revenue doubles to $31 billion as cash flow stays deep red. Capital expenditures hit a record $51.4 billion and free cash flow was negative $9.1 billion.

  14. · Valor Econômico (outlet profile)

    Dona do Google reporta resultados abaixo do esperado no 3º trimestre. A Alphabet, controladora do Google, registrou lucro líquido de US$ 26,17 bilhões no terceiro trimestre, o que representa uma queda de cerca de 25,2%…

  15. · Valor Economico (outlet profile)

    Dona do Google reporta resultados abaixo do esperado no 3º trimestre. A Alphabet, controladora do Google, registrou lucro líquido de US$ 26,17 bilhões no terceiro trimestre, o que representa uma queda de cerca de 25,2%…

  16. · Forbes (outlet profile)

    Alphabet Tumbles 8% As Quarterly Revenue Misses Expectations. Alphabet reported $127.6 billion in third-quarter revenue, falling short of investor expectations.

  17. · Business Insider (outlet profile)

    YouTube missed expectations on ad revenue as growth slowed down. YouTube's third-quarter ad revenue fell short of analyst estimates, while its number of music and premium subscribers crossed 150 million.

  18. · O Globo (outlet profile)

    Receita e lucro da Alphabet, controladora do Google, ficam abaixo do esperado no terceiro trimestre. A Alphabet, controladora do Google, divulgou seus resultados financeiros do terceiro trimestre após o fechamento do me…

  19. · Handelsblatt (outlet profile)

    Internet-Riese: Google-Mutter Alphabet verfehlt Umsatzerwartungen. Das Geschäft von Google wächst weiter - aber nicht mehr so schnell wie noch kürzlich. Anleger sind alarmiert und schicken die Aktie auf Talfahrt.

  20. · La Tercera (outlet profile)

    Resultados de la matriz de Google decepcionan por flujo de caja libre negativo y acción cae. La acción de Alphabet llegó a bajar un 9% tras el reporte de sus resultados en el tercer trimestre.

  21. · Handelsblatt (outlet profile)

    Unternehmen: Alphabet-Gewinn schrumpft um ein Viertel – Google-Mutter kann Erwartungen nicht erfüllen. Alphabets Cloudgeschäft wächst rasant, doch hohe Investitionen in KI-Infrastruktur belasten den Cashflow. Der berein…

  22. · Folha de S.Paulo (outlet profile)

    Ações do Google caem 9% após gasto de US$ 51 bilhões com IA ampliar queima de caixa. O Google sofreu uma forte queda na bolsa após elevar seus gastos com inteligência artificial para mais de US$ 50 bilhões no terceiro t…

  23. · InfoMoney (outlet profile)

    Alphabet: dona do Google frustra em lucro e fluxo de caixa negativo sobe; ação cai 9%. Já a receita registrada nos três meses encerrados em 30 de setembro foi de US$ 127,6 bilhões, um aumento de 25%, mas ainda um pouco…

  24. · UOL (outlet profile)

    Ações do Google caem 9% após gasto de US$ 51 bilhões com IA ampliar queima de caixa. O Google sofreu uma forte queda na bolsa após elevar seus gastos com inteligência artificial para mais de US$ 50 bilhões no terceiro t…

  25. · TechCrunch (outlet profile)

    Google expands AI Search ads globally as core ad growth slows. The announcement came alongside parent company Alphabet's third-quarter earnings report, which saw revenue grow 25% year over year to $127.6 billion.

  26. · The National (UAE) (outlet profile)

    Alphabet stock drops after profit and sales fall. (Bloomberg) -- Alphabet Inc. reported quarterly sales and profit in the third quarter that fell short of expectations, a sign that the firm is failing to generate enough…

  27. · Clarín (outlet profile)

    Acciones de Alphabet, matriz de Google, caen por resultados inferiores a lo previsto. Las acciones de la matriz de Google cayeron tras reportar ganancias menores a lo esperado y una baja en su negocio de anuncios. El in…

  28. · Handelsblatt (outlet profile)

    KI: Teurer KI-Wettlauf – Alphabet verschreckt die Wall Street. Die Cloudsparte verdoppelt ihren Umsatz, trotzdem stürzt die Alphabet-Aktie ab: Werbegeschäft und Gewinn enttäuschen, der KI-Ausbau verschlingt Milliarden.

  29. · New York Post (outlet profile)

    Google parent Alphabet tumbles after profit disappoints, warns AI is battering its cash flow. Alphabet's cash burn was driven by spending to boost cloud capacity and fund AI research.

  30. · Business Insider (outlet profile)

    Microsoft cuts capex forecast on AI capacity delays. CFO Amy Hood cited delays in third-party capacity as Wall Street scrutinizes returns on AI spending.

Factual core

  • The earnings report triggered a sharp decline in Alphabet's share price.
  • The drop in Alphabet's stock reflects concerns about the profitability of artificial intelligence investments.
  • Alphabet's Google Cloud division saw revenue double in Q3 2026.
  • The Q3 earnings report triggered a decline in Google's stock price.
  • AI-mode searches threaten profits from Google's main advertising business.

Full methodology →

In the daily issue: The day in brief — October 29, 2026

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