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AI stocks haven’t played by the normal valuation rules. Now that rates are higher, they may have to, says UBS

Historically, the surges in investment and in the profitability it produced have proven unsustainable for U.S.

✦ Extractive summary — built from the sources' own reporting•From 1 source•1 min read•Updated October 27, 2026, 11:15 AM UTC

Historically, the surges in investment and in the profitability it produced have proven unsustainable for U.S.

How this summary was made: extractive summary — built from the sources' own reporting. It is drawn only from the reporting of the sources listed below — read the originals for full detail. How we summarize →

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Every article behind this summary — 1 article from 1 outlet