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【题目】 Does
Generative AI Facilitate Investor Trading? Evidence from ChatGPT Outages ( Working Paper , 2024 ) 【作者】 Qiang
Cheng , Pengkai Lin , Yue Zhao 【摘要】 In
this paper, we use ChatGPT outages to investigate whether investors rely on
generative artificial intelligence (GAI) to perform trading-related tasks and
the associated impact on stock price informativeness. We first document a
significant decline in stock trading volume during ChatGPT outages and find
that the effect is stronger for firms with corporate news released immediately
before or during the outages. We further document similar declines in the short
run price impact, return variance, and bid-ask spreads, consistent with a
reduction in informed trading during the outage periods. Lastly, we use trading
volume changes during outages to construct a firm-level measure of the
intensity of GAI-assisted trading and provide early evidence of a positive
effect of GAI-assisted trading on long-run
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