This paper examines whether four AI events between 2022 and 2025 - ChatGPT, GPT-4, the EU AI Act vote, and DeepSeek - changed the behaviour of fourteen US-listed stocks. The focus of the analysis is on two utilities that signed power purchase agreements with large AI companies, Constellation Energy and Vistra, which ar...
G. Caporale, L. Gil-Alana, Alex Medina Sosa· CESifo working papers· 0 citations
This paper investigates how Economic Policy Uncertainty (EPU) affects the returns and volatility (proxied by squared returns) of 448 S&P 500 stocks over the period January 2010–December 2020, and whether volatility persistence is related to EPU sensitivity. Persistence is measured with three semiparametric estimators o...
G. Caporale, L. Gil-Alana, Jesus Pantoja Cárdenas· CESifo working papers· 0 citations
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