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AI spending fears hit big tech stock valuations

A specialist trader works inside a booth on the floor at the New York Stock Exchange (NYSE) in New York City, U.S., November 19, 2025. REUTERS/Brendan McDermid

A specialist trader works inside a booth on the floor at the New York Stock Exchange (NYSE) in New York City, U.S., November 19, 2025. REUTERS/Brendan McDermid

AI spending fears hit big tech stock valuations

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(Reuters) – The world’s most valuable technology stocks have suffered sharp declines in market value this year after years of outsized gains, as investors question whether heavy spending on AI will generate sufficient returns to justify the lofty valuations.

In Brief:
  • Microsoft shares fell about 17% in 2026, erasing roughly $613 billion in market value.
  • dropped nearly 14% as the company signaled capital spending could jump more than 50%.
  • , Apple and also posted valuation declines amid shifting investor sentiment on AI.
  • TSMC, Samsung Electronics and Walmart gained market value as investors rotated into other sectors.

Microsoft shares have fallen about 17% year-to-date on concerns over risks to its AI business and growing competition from Google’s latest Gemini model and Anthropic’s Claude Cowork AI agent, wiping roughly $613 billion off its market value to about $2.98 trillion as of Friday.

Amazon has shed around 13.85% so far this year, erasing about $343 billion in market value and leaving the company valued at roughly $2.13 trillion.

Earlier this month, Amazon said it expects capital spending to jump more than 50% this year.

Nvidia, Apple and Alphabet have also seen their market values decline by $89.67 billion, $256.44 billion and $87.96 billion, respectively, since the start of 2026, to $4.44 trillion, $3.76 trillion and $3.7 trillion.

The pullback signals a broader shift in market psychology, with investors moving from rewarding long-term AI ambitions to demanding near-term earnings visibility after years of speculative enthusiasm.

By contrast, TSMC, Samsung Electronics and Walmart have added $293.89 billion, $272.88 billion and $179.17 billion in market value, respectively, over the same period, lifting their valuations to $1.58 trillion, $817 billion and $1.07 trillion.

(Reporting by Gaurav Dogra and Patturaja Murugaboopathy in Bengaluru; Editing by Sumana Nandy)

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