TRV-2026-2402Published recordPeer-reviewed

The effect of AI investment announcements on adopting companies abnormal returns: A critical analysis of the UK market

While artificial intelligence (AI) has become increasingly prevalent, empirical evidence on its impact on firm value is limited. This inaugural UK market study uses event study methodology to assess stock market reactions to AI investment announcements by FTSE 100 companies from 2019-2023. Analysing 138 announcements from 53 companies, the research reveals that AI investments have a marginally positive, but statistically insignificant impact of 0.114% on the announcement day, affirmed by both parametric and non-…

Business · Problem Space (a documented problem) · first published 2026-11-06 · v1 · read the full story · raw data (JSON)

The problem

A study of 138 AI investment announcements by 53 FTSE 100 companies found no statistically significant announcement-day share-price gain (0.114%), and high credit rating firms and early adopters saw significantly negative effects.

What this doesn’t fix

The study covers only FTSE 100 announcements from 2019 to 2023, and the second-mover advantage interpretation is described as tentative evidence.

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Truvace Impact Record TRV-2026-2402, v1: “The effect of AI investment announcements on adopting companies abnormal returns: A critical analysis of the UK market.” Truvace, 2026-11-06. /record/TRV-2026-2402 (accessed on the day you copy it). sha256 99878a9f4b3be8f2…

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