Is User-Generated Twittersphere Activity Associated with Stock Market Reactions to 8-K Filings?

2021 ◽  
Author(s):  
ROGER DEBRECENY ◽  
Asheq Rahman ◽  
TAWEI WANG
Keyword(s):  
Information Content ◽  
Trading Volume ◽  
Abnormal Returns ◽  
Market Returns ◽  
Stock Valuation ◽  
Market Reactions ◽  
Stock Liquidity ◽  
Economic Significance ◽  
Corporate Announcements ◽  
Stock Market Reactions

Prior studies have demonstrated that company-generated tweets as a device for the dissemination of corporate announcements help reduce information asymmetry. This paper demonstrates that user-generated tweets around corporate announcements have information content in addition to the information content of the announcement itself. Using a sample of S&P 1500 firms, we test the effects of abnormal levels of user-generated tweets and abnormal sentiment in the tweets over the three days surrounding 8-K filings of unanticipated events on market returns and liquidity of stocks. Results show that abnormal levels of user-generated tweets are positively associated with both the absolute cumulative abnormal returns and cumulative abnormal trading volume. We also find an indication of a cautionary stance by the market when sentiment is negative around the announcements. Our results have economic significance from both the stock valuation and the stock liquidity perspectives.

scholarly journals Stock Market Reactions to the Comprehensive and Progressive Agreement for Trans-Pacific Partnership’s Approval: Evidence from Vietnam

2021 ◽  
Vol 36 (3) ◽  
pp. 462-490
Author(s):  
Son Tung Ha ◽  
Thi Hong Hanh Pham ◽  
Thi Nguyet Anh Nguyen
Keyword(s):  
Stock Market ◽  
Abnormal Returns ◽  
Stock Exchanges ◽  
Market Returns ◽  
Market Reactions ◽  
Listed Firms ◽  
Stock Market Performance ◽  
Study Methodology ◽  
Stock Market Reactions ◽  
Event Study Methodology

We examine the stock market performance of Vietnam’s listed firms in response to the country’s approval of the Comprehensive and Progressive Agreement for Trans-Pacific Partnership (CPTPP). Employing an event study methodology, we first calculate the abnormal returns of all listed Vietnamese firms around the CPTPP’s approval date. Then, we attempt to link these abnormal returns to firms’ characteristics. We find evidence that the announcement of the CPTPP’s approval is associated with positive abnormal returns for Vietnam’s listed firms. We also find considerable heterogeneity in the magnitude and pace of the impacts of the CPTPP’s approval on market returns across Vietnam’s two stock exchanges. However, we fail to reject the null hypothesis that the market did not react to the CPTPP’s approval at the sectoral level.

Big is beautiful: the information content of bank rating changes

2015 ◽  
Vol 16 (3) ◽  
pp. 233-252 ◽  
Author(s):  
Christian Fieberg ◽  
Finn Marten Körner ◽  
Jörg Prokop ◽  
Armin Varmaz
Keyword(s):  
Stock Market ◽  
Stock Returns ◽  
Information Content ◽  
Abnormal Returns ◽  
Too Big To Fail ◽  
Market Reactions ◽  
Content Type ◽  
Small Banks ◽  
Rating Changes ◽  
Stock Market Reactions

Purpose – The purpose of this paper is to study the information content of about 3,300 global bank rating changes before and after the Lehman bankruptcy in September 2008 to assess if differences in stock market reactions for small and big banks emerge. Design/methodology/approach – The analysis of the stock market reactions of rating changes (upgrades and downgrades) and bank’s size (small and big) is conducted by an event study approach. Findings – The authors find that while upgrades are not associated with significant abnormal bank stock returns, downgrades have a significantly negative effect. This result holds for both small and big banks, while negative abnormal returns are considerably stronger for the former. For small banks, the authors observe an increase in negative cumulative abnormal returns post-Lehman. The lack of a reaction to large banks’ rating downgrades in the narrow [−1,+1] event window indicates that their stock prices may, to some extent, be insulated from negative rating information even post-Lehman, which the authors attribute to an implicit “too big to fail” subsidy anticipated by equity investors. Originality/value – This paper provides insights to the differences in the information content of changes in small and big banks’ credit rating on stock returns that is unrelated to the well-known size effect. Compared to small banks, big banks seem to some extent be insulated from negative rating changes even post-Lehman – contributing to the on-going too big to fail debate.

Systemic operational risk

2017 ◽  
Vol 18 (3) ◽  
pp. 252-267 ◽  
Author(s):  
Thomas Kaspereit ◽  
Kerstin Lopatta ◽  
Suren Pakhchanyan ◽  
Jörg Prokop
Keyword(s):  
Factor Model ◽  
Abnormal Returns ◽  
Operational Risk ◽  
Spillover Effects ◽  
Market Reactions ◽  
Content Type ◽  
Banking Market ◽  
Specific Factors ◽  
Stock Market Reactions ◽  
High Degree

Purpose The aim of this paper is to study the information content of operational loss events occurring at European financial institutions with respect to the announcing bank’s industry rivals from an equity investor’s perspective. Design/methodology/approach The authors conduct an event study to identify spillover effects of operational loss events using the Carhart (1997) four-factor model as a benchmark model. In addition, they conduct multiple regression analyses to investigate the extent to which firm-specific factors or the market environment affect abnormal returns. Findings They observe significant negative abnormal returns following operational loss announcements exceeding € 50 million for both the announcing firms and their competitors. In addition, they find that stock market reactions occur only within a very small event window around the announcement date, indicating a high degree of market efficiency. Finally, abnormal returns tend to be insignificant for smaller loss amounts. Originality/value While operational risk is often believed to be strictly firm-specific, the results show that large operational risk events are not purely idiosyncratic; rather, they are systemic in the sense that they have contagious effects on non-event banks. Thus, the authors shed new light on how operational risk affects equity investors’ investment behaviour in an opaque and highly interconnected banking market.

More than just Noise? Examining the Information Content of Stock Microblogs on Financial Markets

2018 ◽  
Vol 33 (1) ◽  
pp. 50-69 ◽  
Author(s):  
Ting Li ◽  
Jan van Dalen ◽  
Pieter Jan van Rees
Keyword(s):  
Financial Markets ◽  
Stock Returns ◽  
Information Content ◽  
Computational Linguistics ◽  
Trading Volume ◽  
Abnormal Returns ◽  
Feature Reduction ◽  
Individual Investors ◽  
Market Sentiment ◽  
Aggregation Of Information

Scholars and practitioners alike increasingly recognize the importance of stock microblogs as they capture the market discussion and have predictive value for financial markets. This paper examines the extent to which stock microblog messages are related to financial market indicators and the mechanism leading to efficient aggregation of information. In particular, this paper investigates the information content of stock microblogs with respect to individual stocks and explores the effects of social influences on an interday and intraday basis. We collected more than 1.2 million stock-related messages (i.e., tweets) related to S&P 100 companies over a period of 7 months. Using methods from computational linguistics, we went through an elaborate process of message feature reduction, spam detection, language detection, and slang removal, which has led to an increase in classification accuracy for sentiment analysis. We analyzed the data on both a daily and a 15-min basis and found that the sentiment of messages is positively affected with contemporaneous daily abnormal stock returns and that message volume predicts 15-min follow-up returns, trading volume, and volatility. Disagreement in microblog messages positively influences stock features, both in interday and intraday analysis. Notably, if we give a greater share of voice to microblog messages depending on the social influence of microbloggers, this amplifies the relationship between bullishness and abnormal returns, market volume, and volatility. Following knowledgeable investors advice results in more power in explaining changes in market features. This offers an explanation for the efficient aggregation of information on microblogging platforms. Furthermore, we simulated a set of trading strategies using microblog features and the results suggest that it is possible to exploit market inefficiencies even when transaction costs are included. To our knowledge, this is the first study to comprehensively examine the association between the information content of stock microblogs and intraday stock market features. The insights from the study permit scholars and professionals to reliably identify stock microblog features, which may serve as valuable proxies for market sentiment and permit individual investors to make better investment decisions.

Stock market reactions to layoff announcements – analysis of the renewable energy sector

2017 ◽  
Vol 11 (2) ◽  
pp. 311-328 ◽  
Author(s):  
Stephan Kunert ◽  
Dirk Schiereck ◽  
Christopher Welkoborsky
Keyword(s):  
Renewable Energy ◽  
Stock Market ◽  
Capital Market ◽  
Abnormal Returns ◽  
Shareholder Wealth ◽  
Energy Sector ◽  
Market Reactions ◽  
Content Type ◽  
The Public ◽  
Stock Market Reactions

Purpose This study aims to analyze stock market reactions to layoff announcements in the renewable energy sector. The global renewable energy sector and most of the producers of wind and solar energy equipment are struggling. While changes in the regulation and in the promotion of energy production from renewable sources reduced the attractiveness of these technologies, many involved companies had to downsized their workforce to increase performance. The public often perceives these announcements as a way of increasing shareholder wealth at the cost of the employees. Support for this claim is often given in the form of isolated case study considerations. However, the case may be different for the renewable energy sector as changes in the overall institutional environment have sustainably deteriorated the prospects of this industry. Design/methodology/approach This study analyses stock market reactions of 65 layoff announcements made by companies in the renewable energy industry in the years from 2005 to 2014. The reactions are measured by cumulative abnormal returns, which are obtained by using the event study methodology. Findings It shows a significantly negative market reaction to the announcement of a layoff plan on the event day. The findings are generally in line with our expectations and underline the negative perspectives of the sector from a capital market point of view and the declining importance of the sector with respect to employment numbers. Originality/value The results of this study are important for investors when estimating the capital market reactions to layoff announcements and when they form their own expectations regarding possible future layoff announcements. For the public, the results are of interest as the prejudice, that layoff plans are used to increase shareholder wealth, can be dismantled. The opposite is shown.

scholarly journals Reaction of Sharia Capital Market toward Political Events in Indonesia

2021 ◽  
pp. 11-20
Author(s):  
Sisca Debyola Widuhung
Keyword(s):  
Event Study ◽  
Capital Market ◽  
Trading Volume ◽  
Presidential Elections ◽  
Abnormal Returns ◽  
The Political ◽  
Stock Trading ◽  
Market Reactions ◽  
Political Events ◽  
Observation Period

This study aims to examine the reaction of the sharia capital market to political events in Indonesia. The political events referred to in this study are the events of the 2014 and 2019 presidential elections. The market reactions used are abnormal returns and stock trading volume. The sample in this study is stocks included in the Jakarta Islamic Index (JII) during the study period, which are 22 stocks. This study used an event study with an observation period of 21 trading days, namely 10 trading days before, one day of the day event, and 10 trading days after the 2014 & 2019 presidential and vice presidential elections. From the result, it can be seen that both tests are greater than 5%. Therefore, H0(1 and 2) are accepted.

scholarly journals ABNORMAL RETURN DAN LIKUIDITAS SAHAM ATAS PENGUMUMAN AKUISISI

2017 ◽  
Vol 20 (1) ◽  
pp. 151
Author(s):  
Suherman Suherman ◽  
Riznita Nuraisyah ◽  
Gatot N. Ahmad
Keyword(s):  
Mergers And Acquisitions ◽  
Abnormal Return ◽  
Trading Volume ◽  
Abnormal Returns ◽  
Merger And Acquisition ◽  
Stock Liquidity ◽  
Before And After ◽  
The Difference ◽  
Adjusted Model ◽  
Observation Period

Tujuan penelitian ini adalah untuk menganalisis perbedaan abnormal return dan likuiditas saham sebelum dan sesudah pengumuman akuisisi. Pengukuran abnormal return menggunakan market-adjusted model. Pengukuran likuiditas saham menggunakan volume perdagangan dan Amihud’s Illiquidity ratio. Periode pengamatan (event windows) penelitian ini selama 11 hari bursa, yaitu 5 hari bursa sebelum pengumuman akuisisi dan 5 hari bursa sesudah pengumuman akuisisi. Sampel penelitian ini adalah 70 perusahaan yang mengumumkan akuisisi antara 2010-2014. Hasil uji hipotesis menunjukkan bahwa 1)terjadi perbedaan abnormal return yang signifikan sebelum dan sesudah akuisisi, dan 2)tidak terdapat perbedaan likuiditas saham yang signifikan pada periode sebelum dan sesudah akuisisi.The purpose of this study is to analyze the difference of abnormal return and liquidity before and after the announcement of mergers and acquisitions. Abnormal returns are measured with market-adjusted model. Liquidity is measured with trading volume and Amihud Illiquidity ratio. The observation period (event windows) of this research is 11 trading days which 5 trading days before the announcement of the merger and acquisition and 5 trading days after the announcement mergers and acquisitions. Research sample consists of 70 companies which announce merger and acquisition between 2010 and 2014. The results show that 1)there is significant differences of abnormal returns before and after merger and acquisition, and 2)there is no significant differences of stock liquidity before and after merger and acquisition.

scholarly journals Information Content of Dividend Changes in an Emerging Market

2004 ◽  
Author(s):  
Nur Adiana Hiau Abdullah ◽  
Rosemaliza Abdul Rashid ◽  
Yusnidah Ibrahim
Keyword(s):  
Cash Flow ◽  
Emerging Market ◽  
Abnormal Returns ◽  
Agency Cost ◽  
Free Cash Flow ◽  
Cross Sectional ◽  
Market Reactions ◽  
Dividend Announcements ◽  
Stock Market Reactions ◽  
Relationship Of

Supports on the free cash flow and agency cost theory from dividend announcements studies have been heavily discussed in the Western literature, but they have not been given much attention in the Asian countries, particularly in Malaysia. This paper focuses on examining the relationship of the stock market reactions due to dividend announcements and ten company-specific variables identified from the literature as potential determinants. The results from cross-sectional and stepwise regressions both showed that none of the determining variables could explain the variation in cumulative abnormal returns (CARs) for the increasing dividend announcements. For decreasing dividend announcements, both regressions identified the degree of anticipation to be significant and inversely related to CARs. In addition, the indigenous population ownership, which is a unique characteristic of the Malaysian equity market is also found to be significant in influencing the effect of decreasing dividend announcements. The findings provide no support for the free cash flow and agency cost theory.  

Detecting Information Content of Corporate Announcements Using Variance Increases: A Methodological Study

1997 ◽  
Vol 12 (4) ◽  
pp. 415-430 ◽  
Author(s):  
Chandra Subramaniam
Keyword(s):  
Information Content ◽  
Null Hypothesis ◽  
Stock Return ◽  
Alternative Hypothesis ◽  
Abnormal Returns ◽  
Rank Test ◽  
Cross Sectional ◽  
Corporate Announcements ◽  
Return Variance ◽  
Sectional Rank

This paper evaluates various methodologies used in event studies to detect the information content of corporate announcements using the increase in the variance of the security returns. Simulation with daily stock return data show that the Patell procedure, the most commonly used method to detect information content, rejects the null hypothesis of no increase in event-induced return variance too frequently when the null is true. A non-parametric cross-sectional rank test of squared abnormal returns similar to that in Corrado (1989) is proposed that is better specified under the null hypothesis and more powerful under the alternative hypothesis than the parametric tests.

scholarly journals Stock Market Reactions to Financing and Payment Decisions for European Mergers and Acquisitions

2020 ◽  
Vol 4 (2) ◽  
pp. 41-89
Author(s):  
Wolfgang Bessler ◽  
David Kruizenga ◽  
Wim Westerman
Keyword(s):  
Stock Market ◽  
Mergers And Acquisitions ◽  
Abnormal Returns ◽  
Market Reactions ◽  
Valuation Effects ◽  
Payment Methods ◽  
Cumulative Abnormal Returns ◽  
Study Methodology ◽  
Acquisition Announcements ◽  
Stock Market Reactions

Aim: We analyze stock market reactions to merger and acquisition announcements for firms in Europe and contribute to the literature by providing empirical evidence how the decisions with respect to alternative financing sources (equity or debt) and the methods of payment (cash or stock) affect the magnitude of the valuation effects.   Research design: An event study methodology is applied to 717 M&A transactions. We analyze the size of the cumulative abnormal returns using the financing sources and payment methods and other variables as the relevant determinants.   Findings: The cumulative abnormal results suggest that target shareholders and bidder shareholders in private deals benefit from mergers and acquisitions. The effect found is centered around the announcement date, making our findings consistent with market efficiency. Debt financed deals outperform equity financed deals and cash paid M&A outperform stock paid M&As, due to information asymmetry, signaling and agency effects.   Originality: This study adds to our understanding of the relevance of the financing sources and the payment methods for mergers and acquisitions in Europe.   Implications: This study may help practitioners to better assess the valuation effects of alternative financing sources and payment methods when acquiring other firms.     JEL: G32, G34

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