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This research aims to examine the changes in abnormal returns (AR) and trading volume activity (TVA) before and after the announcement of MUI Fatwa Number 83 of 2023, which targets companies for boycott due to their alleged affiliation with Israel. This study employed an event study approach, using a 5-day event window, 10-day event window, 20-day event window and 30-day event window before and after the Fatwa's announcement to measure abnormal returns and trading volume activity. The analysis began by examining the normality of the data to determine whether it was normally distributed. For normally distributed data, a Paired Sample T-test was used, while the Wilcoxon Signed Rank test was applied to non-normally distributed data. The analysis reveals a significant difference in AR during the initial 5-day window, indicating a strong short-term market reaction driven by investor sentiment and uncertainty. However, for longer windows (10, 20, and 30 days), no significant differences in AR were found, suggesting that the market stabilized as new information was absorbed, consistent with the Efficient Market Hypothesis (EMH) by Eugene Fama (1970). Conversely, TVA showed significant increases across all event windows, indicating sustained investor interest and heightened trading activity. This suggests that while the impact on stock prices was short-lived, the boycott had a lasting influence on trading volume, reflecting continued portfolio adjustments. [ABSTRACT FROM AUTHOR]

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This study aims to analyze the efficient market form of the Jakarta Islamic Index. The methodology used is an event study with a window period of 20 days, including ten days before and ten days after the announcement of composition changes held twice a year. The sample consists of 102, with 30 companies listed during the study period and 36 companies excluded and re-listed following the composition change announcements. The analysis technique used is the Paired Sample T-test. The findings reveal no differences in abnormal returns and trading volume activity before and after the announcement. This suggests that the market had already absorbed the announcement information before the event, resulting in a weak reaction and indicating that the announcement did not significantly impact the Jakarta Islamic Index. This implies that the index operates in a semi-strong form of market efficiency. Consequently, companies listed in the index may need additional strategies to improve their stock performance. To provide further insight, this study also examines the average stock trading activity of companies that enter and exit the composition of the Jakarta Islamic Index for the 2019-2023 periods.

The purpose of the study is to determine the impact of the COVID‑19 pandemic on the market response, measured by abnormal returns, cumulative abnormal returns and average abnormal returns. The authors use OLS events and regression analysis methods to measure market response at three-time intervals: in the beginning of COVID‑19, during the onset of Delta and Omicron viruses. OLS is used to measure the capital market reaction in the window (–10, +10) for each industry index. The results of the study show that investors reacted very sharply to the onset of COVID‑19, which caused high volatility in the market. Most abnormal returns after the pandemic announcement reacted negatively. Only three sectors — consumer, infrastructure and trade — were in the safe zone. At the same time, the spread periods of Delta and Omicron viruses are characterized by slight differences in the average abnormal yield after the announcement. The results of a study in three time frames concluded that the market response was significant only to five-day (0, +5) ads based on AAR and CAAR.

On December 5, 2022, Bursa Efek Indonesia resolutely revealed the primary economic data, which will be used as an event study in this investigation to understand the impact of abnormal return on the market and trading volume activity. The research window for this study is 11 days, which includes 5 days prior to the event, 5 days after the incident, and an estimated 14 days after the event. The type of research in this study is an event study. In this case, the independent variable (variable X) is the event of launching the New Board Economic whereas the dependent variables (variable Y) are abnormal return and trading volume activity. The research sample consists of companies listed on the new economic listing board. The companies included in the sample are GOTO, BUKA, and BELI. Hypothesis testing is done using One Sample T-Test and Paired Sample T-Test. The research results show that the significance value of abnormal return on T-5 is <0.05, whereas for other periods it is >0.05. Similarly, all periods of trading volume activity show values >0.05. This indicates that there is a significant abnormal return on T-5, or 5 days before the event of the launch of the New Economic Board. Meanwhile, in other periods, there is no significant abnormal return, and none of the periods show significant trading volume activity. In the difference test, the Sig. (2-tailed) values for both abnormal return and trading volume activity are >0.05, indicating no difference in abnormal return before and after the launch of the new economic board, as well as no difference in trading volume activity. [ABSTRACT FROM AUTHOR]

In 2021, the Australian Government introduced its News Media and Digital Platforms Mandatory Bargaining Code ('the Code') to support the sustainability of the country's journalism. Using Event Study Methodology, we find a collectively positive stock market reaction in the news media industry to the introduction of the Code, although different patterns amongst individual firms and groups by size to the different stages of the Code's development. The large-firm group records larger gain in terms of equity value, but a lower percentage gain than small and medium enterprises. The economic importance of our findings reinforces the Australian Government's regulatory approach as a means to sustain the legitimate interest of businesses and consumers in the news media sector. [ABSTRACT FROM AUTHOR]

Patents play a vital role in securing technological competitiveness for companies. Acquisition of such means the definitive acquisition of exclusive rights that substantially contribute to the improvement of firm value, so it is appropriate to observe changes in firm value. This study examines the change in firm value according to the announcement of patent acquisition based on data disclosed by companies from February 2009 to January 2017, when the acquisition of patent rights was changed from ad-hoc disclosure to voluntary disclosure. After estimating the abnormal return through the market model of the event study methodology, the factors affecting firm value were analyzed through regression analysis with the cumulative abnormal return as a dependent variable. The main empirical analysis results of the study are as follows. First, in the patent application, the average abnormal return appears positive before the announcement, and then the AAR turns negative on D-0. As for patent acquisition, the AAR appears positive on D-0 and then turns negative after the announcement. Before it is officially announced, information about a patent application is already reflected in stock prices by market forecasts or insider trading, while the information about patent acquisition is reflected in stock prices at the time of public announcement. There is a difference in the reaction time of investors in the stock market depending on patent application and patent acquisition. In particular, although a patent acquisition announcement is self-disclosure, investors still perceive a company's patent acquisition as useful information, which eventually enhances firm value. Second, because of the identifying factors that affect firm value, significant differences were found in firm value depending on the country in which a patent was obtained. As for corporate characteristics, the lower the R&D expense, the leverage ratio, and the operating profitto- sales ratio, the higher the firm value whereas the higher the beta, the higher the firm value. [ABSTRACT FROM AUTHOR]

This study examines the announcement effect of a green bond on the issuer's stock returns in the Indian Stock Market. The event study methodology for data analysis and abnormal returns were calculated using the market model for the 16-day event window that includes the 5 days prior and 10 days after the issuance of the green bonds. The findings of this study show that green bond announcements do not create any significant abnormal returns, thus suggesting investors' irrationality toward environmental factors. This study informs policymakers that investor education relating to the environment is needed in India. [ABSTRACT FROM AUTHOR]

Purpose: The present study, by using signaling perspective aims to investigate short-term valuation impact of rebranding announcements (with name change) on stock performance of 160 service firms listed on NSE NIFTY-500 over the period of 2000–2019. Design/methodology/approach: An event study methodology is used to estimate the cumulative abnormal returns (CARs) and its statistical significance is tested with both parametric and non-parametric test-statistics. Separate analysis has been conducted for firms with "major vs minor" and "restructuring vs non-restructuring" name change. Findings: Findings of the study suggest that rebranding decisions are negatively associated with abnormal returns around the announcement period indicating strong disapproval of name change event. In addition, investors formed strong adverse opinion for major name change firms as compared to minor name change firms. Further, restructured name change sample document larger negative drift than non-restructured sample. Practical implications: Findings offer substantial repercussions for shareholders who can make informed judgments about name change as a signal of reinventing brand identity. Managers should announce detailed rationale behind name change decision to market for enhancing corporate reputation. Originality/value: This study contributes to marketing-finance interface literature and is first to examine market reaction to name change of Indian service firms and moreover, made a distinction between major vs minor and restructured vs non-restructured name change events for these firms. [ABSTRACT FROM AUTHOR]

Abstract: Examining the Market Reaction to the Announcement of the Release of MUI Fatwa No. 83 Year 2023 Purpose: Revealing the market reaction that has an impact on the stimulus in the form of MUI's fatwa on the appeal not to use Israeli-affiliated products released in November 2023. Method: Quantitative method of case study approach. Using statistical analysis of 14 samples of companies listed on the IDX. Data obtained from the IDX and Yahoo Finance pages. Results: Shows that there is no AR and no significant difference during the event period studied. TVA shows significant statistical analysis results. Novelty: The current issue raised, which is related to the announcement of MUI fatwa no. 83 of 2023 concerning the appeal not to use products affiliated with Israel. Contribution: Expand the literature of market reaction studies with the latest relevant issues.nouncement of MUI fatwa no. 83 of 2023 concerning the appeal not to use products affiliated with Israel. Abstrak: Menilik Reaksi Pasar Terhadap Pengumuman Rilis Fatwa MUI No. 83 Tahun 2023 Tujuan: Mengungkap reaksi pasar yang berdampak pada stimulus berupa penerbitan fatwa oleh MUI tentang imbauan menghindari produk terafiliasi Israel pada November 2023. Metode: Metode kuantitatif pendekatan studi kasus menggunakan analisis statistik terhadap 14 sampel perusahaan yang diperoleh dari laman BEI dan Yahoo Finance. Hasil: Mengungkapkan tidak adanya AR serta tidak ada signifikansi perbedaan selama Jendela Peristiwa yang diobservasi. TVA menunjukkan hasil analisis statistik yang signifikan. Kebaruan: terletak pada isu yang diangkat saat ini, yaitu terkait dengan pengumuman fatwa MUI no. 83 tahun 2023 tentang himbauan untuk tidak menggunakan produk yang berafiliasi dengan Israel. Kontribusi: Memperluas literatur kajian reaksi pasar dengan isu terbaru yang relevan.

This research aims to observe how the Indonesian capital market reacts, especially in the mining sector, to the export ban resulting from the Russian invasion of Ukraine, particularly on coal exports. This study uses the event study method by collecting closing stock price data 5 days before and 5 days after the Russian invasion of Ukraine which occurred on February 24, 2022. This research indicates that the Russian invasion of Ukraine had a significant impact on the market, as evidenced by the disparities in average abnormal returns before and after the events, as well as the fluctuations in stock prices and substantial abnormal returns when comparing the days surrounding the events. The theories employed in this study include the Efficient Market Hypothesis and Signal Theory. This study only uses mining company as a sample and abnormal returns and stock prices as variables. This research does not only look at the average difference before and after the Russian invasion of Ukraine. But also compare the difference in stock prices and abnormal returns between each day before and after the event. The results of the research conducted are in line with previous research conducted by Theiri et al., (2022).

This research aims to observe how the Indonesian capital market reacts, especially in the mining sector, to the export ban resulting from the Russian invasion of Ukraine, particularly on coal exports. This study uses the event study method by collecting closing stock price data 5 days before and 5 days after the Russian invasion of Ukraine which occurred on February 24, 2022. This research indicates that the Russian invasion of Ukraine had a significant impact on the market, as evidenced by the disparities in average abnormal returns before and after the events, as well as the fluctuations in stock prices and substantial abnormal returns when comparing the days surrounding the events. The theories employed in this study include the Efficient Market Hypothesis and Signal Theory. This study only uses mining company as a sample and abnormal returns and stock prices as variables. This research does not only look at the average difference before and after the Russian invasion of Ukraine. But also compare the difference in stock prices and abnormal returns between each day before and after the event. The results of the research conducted are in line with previous research conducted by Theiri et al., (2022). [ABSTRACT FROM AUTHOR]

The research was conducted to find out the reaction of the capital market to the rise in BBM in transportation and logistics sector companies listed on the Indonesian Stock Exchange. This study is an event study or event that arises directly from the rise in the price of oil (BBM) on October 1, 2023, against the market reaction based on the actions of transportation and logistics companies. Abnormal Return and Trading Volume Activity are variables used to analyze reactions. The data collection method used in this research is the Quantitative Data Method. Observations were conducted for 5 days before and 5 days after the BBM rise on October 1, 2023, using the Wilcoxon Signed Ranks test with a sample of 10 companies and a data test of 110. On the test results, there were abnormal differences in return and trading volume activity before and after the rise in BBM prices, the results could help market participants understand market dynamics, find investment opportunities, and manage risk. With a rise in sales, this means investors respond to events so that the markets react. The findings support the theory of signals because investors see the announcement of a BBM rise as a signal that can affect the stock price. [ABSTRACT FROM AUTHOR]

This research aims to examine the influence of environmental, social and governance on abnormal returns. The sample in this research are mining companies that disclosed ESG disclosure scores in 2020-2022. The sampling technique used was purposive sampling to obtain 45 companies that disclosed ESG disclosure scores for 3 consecutive years from 2020-2022. Testing in this research uses descriptive statistics and hypothesis testing. The results of this study show that environmentalism has no effect on abnormal returns. However, social and governance have a positive effect on abnormal returns. [ABSTRACT FROM AUTHOR]

Purpose – This study examines the effect of Covid-19 in Indonesia on the value of abnormal returns, trading volume activity, and efficiency of the Jakarta Islamic Index (JII), the Indonesian Islamic stock market. Methodology – This study employed the event study model to measure the relationship between important events related to the Indonesian Covid-19 pandemic on stock returns and the stock trading volume of JII indexed companies. Using research analysis techniques in the form of a market-adjusted model, this study determines the period of events before, during, and after the event. Findings – This study found that the global Covid-19 announcement, announcement of the new normal, and announcement of the Covid-19 vaccination gave a significant abnormal return reaction to the JII index and did not provide a significant trading volume activity reaction. Implications – Indonesia's Islamic stock market, which falls into the semi-strong efficient category, responds quickly to important public information such as Covid-19-related announcements. Investors showed high sensitivity to major news, but trading volumes did not change significantly, indicating a cautious adjustment strategy. The different reactions across sectors, especially industry and energy, highlight the need for investor portfolio diversification. It is important for policymakers to provide clear and timely communication to maintain market stability during crises. Further research is required to understand the long-term impact and extend the coverage of international Islamic stock markets. Originality – This study examines several important Covid-19 events that occurred in Indonesia on stock returns and trading volumes in the Indonesian Islamic stock market.

Abstract The aim of this article was to examine the effect of tariff changes, moderated by capital ownership, on the abnormal return of Brazilian public utility companies. Based on the capture perspective, regulation can be captured by the regulated party, and capital ownership can shape the pressure from companies on the regulator for regulatory decisions that are favorable to their interests. This issue has not yet been investigated. In the regulatory process, the regulator's decisions generally involve increasing the administered price. As a result, the legitimacy of the regulator is questioned, suggesting that its decisions are biased towards the interests of companies. This study sheds light on this issue. The evidence shows how the private identity of the controlling owner can lead the company to earn a return above the cost of capital through the regulatory process. The sample consisted of regulated companies (from the water and sanitation, piped natural gas and electricity sectors) from 2007 to 2019. The variables used were: abnormal return (dependent); tariff change and capital ownership (independent); and leverage, economic growth, size and sector. The data were estimated using a random effects model, generalized least squares and robustness using a dynamic panel with GMM-SYS (all observations). The results show that the private identity of the owner of the capital can lead to regulatory decisions that are more aligned with the interests of maximizing the profitability of the regulated companies. The results are consistent with the perspective of the economic rationality of private investors to maximize returns and the perspective that public investors prioritize other outcomes rather than abnormal returns.

Tujuan penelitian ini untuk mengukur kemungkinan adanya perbedaan Abnormal Return dan Trading Volume Activity pada harga saham Bursa Efek Indonesia sektor transportasi dan pariwisata sebelum dan sesudah penerapan kebijakan penghapusan PPKM. Pengambilan sampel dengan cara purposive sampling total 37 perusahaan sektor transportasi dan pariwisata terdaftar di Bursa Efek Indonesia. Analisis regresi dilakukan pada penelitian ini dengan pendekatan event study. Uji beda pada penelitian ini menggunakan uji statistic non parametrik Wilcoxon Signed Rank Tes dikarenakan ada sebaran data yang tidak berdistribusi normal. Temuan pada studi ini membuktikan tidak terdapat perbedaan secara signifikan antara abnormal return dan trading volume activity harga saham terhadap penghapusan kebijakan PPKM di Indonesia. Adapun tidak adanya perbedaan mengindikasikan bahwa pemulihan ekonomi di Indonesia sudah mulai bergerak secara perlahan sejak menurunnya kasus COVID 19 pada awal tahun 2022. Peristiwa ini menunjukkan jika kepercayaan investor kembali untuk menginvestasikan dana pada instrumen investasi saham pada perusahaan sektor transportasi dan pariwisata seiring dengan meningkatnya mobilitas walaupun penghapusan kebijakan PPKM belum diumumkan secara resmi. Kata kunci: Abnormal return; trading volume activity; harga saham.

An independent institution gives appreciation to companies in Indonesia that have published their sustainability reports by ranking their sustainability reports in the Asia Sustainability Reporting Rating. This institution plays a role in facilitating and encouraging companies, organizations and other entities in Indonesia to adopt good sustainability reporting practices. This ranking factor is predicted to influence the movement of abnormal returns so that it can influence value relevance through the earnings response coefficient. The aim of this study is to reveal the relevance of value in order to obtain empirical evidence regarding the influence of sustainability reports, sustainable report ratings and earnings persistence on the earnings response coefficient. The research sample was 130 companies in Indonesia that were included in the Asia Sustainability Reporting Ranking for the period 2019 to 2022. This paper uses a quantitative multiple linear regression method to test the hypothesis. The research results show that consistent profits can be predicted from the past and make a positive contribution to future earnings response. A company transparently discloses its performance in the sustainability aspect, thereby making the profit response more positive. Companies with high sustainability ratings tend to get a more positive profit response from the market and stakeholders. This study suggests that management and company owners in Indonesia are aware of the need to pay attention to long-term sustainability through the publication of sustainability reports to become a company’s commitment to implementing sustainability and minimizing risks arising from the company’s economic, social and environmental activities. AcknowledgmentsThe authors would like to thank the Directorate of Research, Community Service and Publications (DPPMP) of Stikubank University for supporting the funding of this research. Thanks also to fellow FEB lecturers who have helped provide the facilities needed for this research.

The phenomenon of stock split is a corporate action to increase the number of shares outstanding in the market with the aim of making the stock price more affordable for investors. This practice is often carried out by company management to enhance stock liquidity and attract investor interest without necessarily increasing net income. However, although Stock Splits are generally considered a positive policy, some studies indicate that in some cases, Stock Splits can be exploited for insider trading activities, especially in markets with weak regulations or emerging markets. The aim of this research is to find out whether there are indicators of insider trading from stock split policies based on similar behavior in capital markets where capital market regulations are still not well regulated ( emerging markets ). By using the event study method, this research did not find any indication of insider trading because there was no cumulative abnormal return in the positive direction before the stock split was executed. By using multiple regression analysis, this research confirms that there is no indication of insider trading which is influenced by the level of state ownership, small company asset size and the tendency to split shares with a high split ratio as has been tested by previous research. [ABSTRACT FROM AUTHOR]

The existence of long-run abnormal returns after major corporate events has become a controversial subject of debate. We contribute new evidence by implementing a daily rolling prediction error (RPE) approach using popular asset pricing models to adjust for time-varying risk parameters in asset pricing models when estimating long-run abnormal returns. Using this simple approach, we find initial significant return responses in the month or two after SEOs and M&As but none thereafter. Robustness checks with different asset pricing models, corporate events, and subperiods corroborate our results. Also, simulation tests confirm the robustness of the RPE method to potential risk shifts. We conclude that, after dynamic risk adjustment, long-run abnormal returns do not occur after the major corporate actions under study. [ABSTRACT FROM AUTHOR]

The aim of this article was to examine the effect of tariff changes, moderated by capital ownership, on the abnormal return of Brazilian public utility companies. Based on the capture perspective, regulation can be captured by the regulated party, and capital ownership can shape the pressure from companies on the regulator for regulatory decisions that are favorable to their interests. This issue has not yet been investigated. In the regulatory process, the regulator's decisions generally involve increasing the administered price. As a result, the legitimacy of the regulator is questioned, suggesting that its decisions are biased towards the interests of companies. This study sheds light on this issue. The evidence shows how the private identity of the controlling owner can lead the company to earn a return above the cost of capital through the regulatory process. The sample consisted of regulated companies (from the water and sanitation, piped natural gas and electricity sectors) from 2007 to 2019. The variables used were: abnormal return (dependent); tariff change and capital ownership (independent); and leverage, economic growth, size and sector. The data were estimated using a random effects model, generalized least squares and robustness using a dynamic panel with GMM-SYS (all observations). The results show that the private identity of the owner of the capital can lead to regulatory decisions that are more aligned with the interests of maximizing the profitability of the regulated companies. The results are consistent with the perspective of the economic rationality of private investors to maximize returns and the perspective that public investors prioritize other outcomes rather than abnormal returns. [ABSTRACT FROM AUTHOR]

The aim of this research is to analyze the Quadruple Witching Days phenomenon and its impact on abnormal returns on the Indonesian stock market. This phenomenon has attracted the attention of many investors and academics, because it is believed to be able to significantly influence stock price movements. It is hoped that the results of this research can provide an in-depth understanding of the influence of Quadruple Witching Days on the Indonesian capital market. Associative descriptive research tests the influence of Quadruple Witching Days. Using secondary data and library methods in the LQ45 and SRI-KEHATI stock indices listed on the Indonesia Stock Exchange for the period 2010 to 2022 with daily and weekly data. The hypothesis test that will be used in this research is the Paired Sample t - Test and the non-parametric Mann-Withney test. There are differences in abnormal returns before and after the Quadruple Witching Days event on the LQ45 stock index. There is no difference in abnormal returns before and after the Quadruple Witching Days event on the SRI-KEHATI stock index. High Vigilance, Quick Selling or Buying, Portfolio Diversification as a consideration for taking profits for investors LQ45, Long Term Investment Approach, Portfolio Stabilization may be more suitable with investment strategies because there is no significant difference in abnormal returns, investors in SRI-KEHATI. [ABSTRACT FROM AUTHOR]

This study investigates the effect of corporate governance characteristics on the financial performance of 124 listed Indian companies that have undergone mergers and acquisitions between 2014 and 2020. It employs several performance measures, such as short-term capital market performance, long-term capital market performance, accounting- and market-based measures, and firm-level control factors. The study finds board size to be a positive and significant factor affecting short-term market performance. Furthermore, it also documents weak linkages with other corporate governance variables, such as board independence and CEO duality. Regarding control variables, leverage, company age, price-to-book ratio, and research and development expenses significantly impact acquiring companies' financial returns. The findings add to our understanding of corporate governance's impact on performance in cases such as mergers and acquisitions. [ABSTRACT FROM AUTHOR]

This study was conducted to analyze whether the declaration of Russia's invasion of Ukraine has an impact on capital market reactions in energy sector companies listed on the Indonesia Stock Exchange so that investors and potential investors become more careful in making decisions regarding investment in a company. The type of research used is a comparative method to test differences from the variables used in the study with a quantitative approach in the form of stock price data, stock volume, and also the number of shares outstanding in the energy sector stocks of the Indonesia Stock Exchange which are then processed into abnormal return data, trading volume activity. Observations were made 5 days before and 5 days after the invasion on February 24, 2022, using the T-test and Wilcoxon Signed Ranks test with a sample of 29 companies and a total of 145 data tested. In the test results, there are abnormal differences in return and trading volume activity before and after the invasion of Russia and Ukraine, this proves that market reaction to the events of the Russian invasion of Ukraine has strong information content and causes an increase in buying and selling activity which means investors respond to events that occur so that the market reacts. [ABSTRACT FROM AUTHOR]

The COVID-19 pandemic created unprecedented challenges for communities and economies around the world. Based on 13 leading global stock indices, the event study method is adopted in this research to explore the impact of the COVID-19 pandemic on the performance of the stock market indices in the short term. Regression results show that the global stock markets performed poorly in response to the COVID-19 pandemic. The findings of the event study imply that the stock markets reacted rapidly and negatively to the COVID-19 pandemic when lockdown restrictions were announced to contain the spread of the novel coronavirus. The Asian stock indices experienced more negative abnormal earnings than the stock indices of the countries outside Asia. Moreover, investor sentiments act as a wedge between financial investment decisions, returns, and fear of uncertainty caused by the pandemic. Furthermore, the panic experienced by investors may be an effective transmission channel through which the COVID-19 outbreak affects the returns on the stock market indices. [ABSTRACT FROM AUTHOR]

South Korea's entertainment industry has gained global popularity. However, the competition between entertainment companies is intense, requiring strategies to ensure their survival, such as imposing restrictions on their artists to maintain their public image and trust. This study examined the impacts of celebrity news and activities on the stock returns of six major entertainment companies listed on the Korea Exchange (KRX) from 2018 to 2021. Using the Fama/French 3 Factors Model regression, the study investigated the presence of abnormal returns. The findings indicate that comebacks and debuts elicit positive reactions and generate significant abnormal returns. Award acceptances and military service also elicit positive reactions but do not generate significant abnormal returns. Conversely, dating news, internal scandals, and national scandals elicit negative reactions, with only national scandals generating significant abnormal returns. These results imply that entertainment companies and investors should actively manage and monitor celebrity news to make informed decisions. [ABSTRACT FROM AUTHOR]

This study investigates how COVID-19 in the United States affects the stock prices of the Taiwanese printed circuit board (PCB) and network communication industries. We utilize the event study method to evaluate the market response to the announcements of the United States COVID-19 and the sample period is from February 2020 to April 2020. This study examines whether the COVID-19 caused stock price variations and generated abnormal returns for Taiwanese companies. Finally, this study also evaluates whether there is a significant difference in abnormal returns among companies who have reported corporate social responsibility (CSR) and companies who have not. This study finds that the United States prevention policies have caused a significant influence on abnormal returns in Taiwan's PCB and network communication industries. Because Taiwan exports PCB to the United States, the stocks price decrease to the United States COVID-19 due to the investors' expectation of the substantial order decline from the United States in in Taiwan's PCB and network communication industries. We use ANOVA to prove the difference among the abnormal returns generated by the first, second and third U.S. COVID-19 announcements. The empirical results show that the first announcement caused the largest reactions, and the third announcement caused the least. Furthermore, the United States government's social distancing policy has caused positive abnormal returns for Taiwan's PCB and network communication industries due to the great demand for online meeting. Furthermore, we find the significant difference between the implementation and loosening of the social distancing polices. This suggests that investors regard the loosening of the United States social distancing policy signal that the order decline in Taiwan's PCB and network communication industries. There is no significant difference between the abnormal returns of companies that have reported their CSR practices and that of companies that have not reported. [ABSTRACT FROM AUTHOR]

This paper examines and reviews the fundamental challenges that academicians face when using the event study methodology to assess the long-term consequences of financial events on the economy and to describe market reactions. Numerous studies have demonstrated that businesses can experience abnormal returns from 1 to 5 years after major financial events. Also, this paper investigates the long-run price performance of initial public offerings (IPOs) in Amman Stock Exchange (ASE). The sample period expands from 2018 to 2022. Various findings are obtained by employing several analytical methods. First, long-run price performance of IPOs is negative, and a strong evidence shows that the long-run performance is sensitive to the benchmark employed. To assess the long-term performance of IPOs, I used both cumulative abnormal returns (CAR) and buy-and-hold abnormal returns (BHAR) as aggregated models. I explained the methodology which is adopted in this study in detail for the event–time approach. However, I used the crucial values for the skewness-adjusted t-statistic to infer statistical tests. Even though BHAR provided weaker results, all methods indicated negative long-run abnormal returns for IPOs. Yet this performance varied when comparing the performance utilizing ASEI, Fama–French three-factor (FF3F), and matching firm (MF) as benchmarks.

This study investigates the response of the Indonesian capital market to the announcement of mergers involving BRI Syariah, BNI Syariah, and Bank Syariah Mandiri, resulting in the establishment of a new entity known as Bank Syariah Indonesia. Employing an event study methodology, this study adopted a time frame of 120 days, comprising a window period of 20 days (consisting of 10 days both before and after the event date). The market model approach was employed to ascertain the abnormal return value observed during the event period. In order to test the hypotheses, this research employed the one-sample t-test for datasets with normal distribution characteristics and the Wilcoxon signed-rank test for datasets that did not conform to a normal distribution. The findings of the study indicated a favorable market reaction, characterized by the disparity in Average Abnormal Return (AAR) following the event date, with a significance value (two-tailed) of 0.027, which was below the 0.050 level of significance. Furthermore, from the perspective of Average Trading Volume Activity (ATVA), a positive reaction was also discerned, as evidenced by the contrast in ATVA during the window period, yielding a significance value (two-tailed) of 0.028, also falling below the 0.050 level of significance. These outcomes offer an enhanced comprehension of how the Indonesian capital markets respond to such mergers, thereby serving as a valuable reference for stakeholders when formulating investment decisions and market strategies.

The regular pattern of quarterly earnings announcements sets up a predictable pattern of information asymmetry in the market. Both regulatory restrictions and voluntary corporate restrictions direct trading to low information asymmetry periods. To understand the effect of these restrictions, this study examines insider trading in three different windows: white windows (3–12 trading days after the earnings announcement, periods with low information asymmetry), black windows (all the other days in the quarter, periods with higher information asymmetry), and the blackest windows (the last 10 trading days of the black window, periods with the highest information asymmetry). First, our results show that a large proportion of insider trading in the United States takes place in the black window. Second, we document that trading in the white period exhibits a strong self-selection bias. We also show that the excess returns earned by black period trades vanish if postponed to the next white period following the earnings announcement. Finally, we show that a relatively large proportion of pre-specified trading under SEC-sponsored 10b5-1 plans are filed for black window periods, but the difference across black and white window plans is a matter of frequency of trade rather than the magnitude of profits. Overall, these results suggest that insiders balance the risk and profitability of their trading in white and black windows and that insider trading restriction in high-information asymmetry periods is not effective in practice. [ABSTRACT FROM AUTHOR]

The announcement of the first PSBB decision is a non-economic event that can affect stock price movements. Signaling theory is the basis of this research. The latest information signals that the regional quarantine announcement can affect the stock price index movement in the capital market. Abnormal returns and trading volume activity are indicators that measure the reaction rate of a stock in the capital market. This study aims to determine whether there is an average abnormal return and trading volume activity before and after the announcement of the PSBB decision. This research is an event study that studies the market reaction with a quantitative approach. The population and sample in this study are company stocks listed on the LQ45 index for February - July 2020 using the Purposive Sampling technique. The research period is five days before and after the event (a total of ten days). The hypothesis test used is the Wilcoxon Signed Rank Test. The result was differences in abnormal returns before and after the event. The Wilcoxon signed rank test results on the trading volume activity variable did not find any significant difference in trading volume before and after the announcement regarding the initial PSBB decision.

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Purpose: With the growing popularity of sports in Taiwan, the Sports Administration under the Ministry of Education introduced the Taiwan iSports Corporate Award campaign. This emphasised sports for employees and assisted in developing and supporting corporate social responsibility (CSR) activities in the sports industry through collaboration with firms, thereby enhancing their corporate image, facilitating the recruitment of high-quality employees and highlighting healthy human resources and brand value. Can sports-based CSR performance reflect firms' market values and reduce their market risks? This study regards Taiwan iSports Corporate Award announcements as important sports-based CSR disclosures and incorporates financial econometrics to examine the relationship between the announcement of sports-based CSR performance and firms' market values and risks. Design/methodology/approach: An event study is conducted to clarify the reactions of the Taiwan iSports Corporate Award announcement event on the abnormal returns of award-winning firms during the 2016–2021 period, and a regression discontinuity design (RDD) model is employed to verify the robustness of the empirical results using the event study method. Findings: Taiwan iSports Corporate Award announcements are not significantly reflected in the positive abnormal returns of award-winning firms. No causal relationship is found between the two. However, there are signs of relatively less systematic risks when investing in award-winning firms than in the market. Originality/value: This study provides empirical evidence and managerial implications for Taiwan iSports Corporate Award-winning firms. It effectively enables business operators, sponsors or investors to understand the reactions of announcing sports-based CSR performance on the financial market and provides references for corporate organizations' CSR and sustainable development. [ABSTRACT FROM AUTHOR]

We investigated the stock return risk associated with the various types of dividend decisions announced by New Zealand firms during the COVID-19 pandemic in 2020. The sample includes a group of firms that initially announced cash dividends but a number of days later made announcements cancelling their payments. Using multinomial logistic regression analysis, we found that higher pre-pandemic payout policy significantly increased the likelihood of a cancellation, an omission or an increase decision. Higher growth and higher profitability reduced the probability of an omission and a reduction decision, respectively. Moreover, higher stock return volatility increased the likelihood of an omission, a reduction or an increase decision. Further event study analysis revealed that investors reacted more feverishly to the announcements of cancellation decisions than any other types of dividend decisions. Moreover, we report strong evidence of negative abnormal returns around the cancellation announcements followed by positive post-announcement price reversals, a pattern that is not observed for the omission announcements. This paper contributes to the literature by studying a cancellation sample and reveals, for the first time, significant shareholder risk associated with cancellation decisions, which was not observed for omission decisions. We alert managers to carefully weigh the costs and benefits of breaking a promise of dividend payout. [ABSTRACT FROM AUTHOR]

The Turn of the month (ToM) effect is a calendar anomaly when the majority of returns of an asset are concentrated into several days around the end of the old month and the start of the new one. Until now, the investigation of the ToM effect has mainly been focused on the stock markets. However, this paper investigates the presence of the ToM effect in eight key agricultural commodity markets (cocoa, coffee, corn, cotton, rice, soybean, sugar, wheat), using three different alternatives of the ToM window, during the 2001-2021 time period. The results show a statistically significant ToM effect in the rice, coffee, and sugar markets. Further results show that the ToM pattern changed during the COVID-19 pandemic, and that, in the case of commodities with a statistically significant ToM effect, the ToM effect can be efficiently used to beat the buy & hold investment strategy convincingly.

Slow diffusion of information in inefficient markets can lead to the transmission of idiosyncratic shocks and make some financial linkages among firms. Using monthly data from 250 firms on Tehran Stock Exchange, we predict the links originated from the idiosyncratic shocks. We use the extracted links for two purposes. In the first step, we examine whether considering the idiosyncratic shocks can lead to a positive abnormal return. In addition, we investigated how the idiosyncratic shocks can help to solve the puzzle of idiosyncratic volatility in the Tehran Stock Exchange. The results show that a portfolio with more shocks yields a significant positive abnormal return. The results also show that using the average idiosyncratic shocks cannot help to solve the puzzle of idiosyncratic volatility. Since the first step results show the significant effect of slow information diffusion on asset returns, we can examine the idiosyncratic shocks as a risk propagation channel in the financial network. Using the network theory, we investigate the idiosyncratic shocks contagion in the financial market. We consider the centrality measures to identify the most vulnerable and systemically important firms and sectors in the financial system. The results show that the portfolios consisting of vulnerable firms can make an abnormal positive alpha with the expense of high systemic risk. [ABSTRACT FROM AUTHOR]

Son yıllarda yaşanan pandemi, ekonomi ve sağlık açısından birtakım zorluklara yol açmıştır. Pandeminin neden olduğu olumsuz etkiler devam ederken ortaya çıkan Rusya-Ukrayna savaşı da özellikle emtia piyasaları aracılığıyla tüm dünyada olumsuz etkilere neden olmuştur. Bununla birlikte savaş, küresel olarak hisse senedi piyasalarını da olumsuz olarak etkilemiştir. Bu doğrultuda çalışmanın amacı, Rusya ve Ukrayna arasında meydana gelen savaşın BIST Gıda, İçecek Endeksi’ne kote olan şirketlerin hisse senedi getirileri üzerindeki etkisini araştırmaktır. Bu bağlamda, söz konusu savaşın anormal getirilere neden olup olmadığı olay çalışması yöntemi ile incelenmiştir. Çalışmanın bulguları, olay gününde başka bir ifadeyle savaşın başladığı günde (24 Şubat 2022 tarihinde) elde edilen pozitif AAR değerlerinin anlamlı olmadığını ancak olay öncesi ve olay sonrası günlerde oluşan bazı anormal getirilerin anlamlı ve negatif (ya da pozitif) olduğunu göstermektedir. Bununla birlikte olayın belirli bir zaman periyodundaki etkisine göre, [0,5] ve [0,15] olay pencerelerinde negatif ve anlamlı CAAR değerlerinin olduğu belirlenmiştir. Bu sonuçlara göre, hisse senedi fiyatlarının yeni bilgilere uyarlanması anlamında piyasasın yarı güçlü formda etkin olmadığı söylenebilir.

The capital market is an investment place that is developing quite rapidly today. When investing in the capital market, investors are facing a trade off between return and risk. The purpose of this study is to analyze the reaction of the capital market to news related to the Covid-19 case in the early stages of the pandemic by using an event study, part of the theory of market efficiency. The announcements that were studied were the reactions: 1) Announcement of the initial appearance of Covid-19, 2). WHO announcement has declared Covid19 a global pandemic, 3). Announcement of spike in Covid-19 cases to reach 10,000. This study used stocks that join the LQ45 index as the population. Furthermore, the technique of determining the sample is a saturated sample. The results show that the capital market reacts to the 3 series of events studied. In addition, there is an abnormal return. This shows that the market is working efficiently in a semi-strong form. Furthermore, based on the paired sample T-test, there is no difference in TVA and transaction frequency before and after the event. For companies that are expected to develop strategies to minimize the occurrence of a significant decline in stock prices due to force majeure events. In terms of investors, this research provides information signals to them that force majeure events can affect market performance.

Keywords: Firm-Specific News; Event Study; Abnormal Return; Trading Volume; Emerging Market, India. In the context of market efficiency, the stock market reaction to arrival of corporate news has been widely researched in the context of developed markets. However, developed markets are distinct from emerging markets. In this paper, we employ a unique dataset of firm-specific news and examine the market reaction associated with the arrival of different firm-specific corporate news in the public domain in the context of India, an emerging market. We study the price and trading volume reaction associated with firm-specific news for a sample of stocks listed on the National Stock Exchange of India using the event study methodology. We observe that the Indian equity market incorporate new information through firm-specific corporate news releases promptly. Besides, our results underscore the role of earnings news and analyst calls in reducing information asymmetry among investors in an emerging market context. Our study reveals that the observations in the context of developed markets cannot be generalized in the context of the India.