This paper studies the stock market response to corporate downgrades by S&P, Moody's and Fitch between 1999 and 2011. The empirical evidence shows that cumulative abnormal returns around downgrades become significantly smaller (in absolute value) after the release in 2003 of the Securities and...

Macroeconomic news announcements are elaborate and multi-dimensional. We consider a framework in which jumps in asset prices around macroeconomic news and monetary policy announcements reflect both the response to observed surprises in headline numbers and latent factors, reflecting other...

We examine the effects of the North Korea-U.S. summit and related events on the South Korean stock market over the period March 2018 to June 2018. Employing the event study methodology, we estimate sectoral abnormal returns following the events surrounding the summit and conduct several...

Since the Russian invasion of Ukraine on February 24, 2022, the West has been intensively discussing its support strategy. Hawkish positions of strengthening Ukraine via armaments, financial resources, and sanctions against Russia compete with dovish views of avoiding further escalation of the...

Return event studies generally involve several companies but there are also cases when only one company is involved. This makes the relevant testing problems, abnormal return (AR) and cumulative abnormal return (CAR), more difficult since one cannot exploit the multitude of companies (by using a...

Since the Russian invasion of Ukraine on February 24, 2022, the West has been intensively discussing its support strategy. Hawkish positions of strengthening Ukraine via armaments, financial resources, and sanctions against Russia compete with dovish views of avoiding further escalation of the...

Since the Russian invasion of Ukraine on February 24, 2022, the West has been intensively discussing its support strategy. Hawkish positions of strengthening Ukraine via armaments, financial resources, and sanctions against Russia compete with dovish views of avoiding further escalation of the...

The Covid-19 crisis put pressure on governments to design immediate support packages for alleviating the negative economic consequences for households and businesses. In this paper, we examine the stock market's reactions to the announcements of each of the four support packages designed by the...

This paper introduces a novel firm-level green innovation measure utilizing ClimateBERT and GPT-3 models to analyze green patent abstracts and earnings call transcripts. Firms with higher green innovation measures experienced lower expected returns: a long-short portfolio generates an average...

We show that the S&P 500’s instantaneous response to surprises in U.S. macroeconomic announcements depends on the level of long-term stock market volatility. When long-term volatility is high, stock returns are more sensitive to news, and there is a pronounced asymmetry in the response to good...