This empirical paper deals with the impacts of insider trading on the firms' share prices. The overall regulation of insider trading determines a certain reporting period in which trades have to be reported to the public. In Germany this subject was revised in 2004, which shall be analysed in this paper.
First, there is an overview of the current state of literature. The CAR (cumulative abnormal return), which serves as the respective measurement for examining the different impacts on the firm's value, is explained. Further, the paper presents impacts of announcement delays on the firm's share price as well as which kind of firms tend to have longer announcement delays than others.
Afterwards, this seminar paper tries to take into account the new regulation of reporting delays which was valid since October 2004. Therefore, the last chapter deals with the methodology of an event study to detect abnormal returns in insider trading and the regression approach to show dependencies between firm characteristics and reporting delays. Finally, a brief conclusion is presented, which gives recommendation for future actions.
Table of Contents
1 Introduction
2 Changes in reporting regulations in Germany
3 Literature review
4 Empirical analysis of insider trading and reporting delay
4.1 Methodology
4.1.1 Dataset
4.1.2 Event study methodology
4.1.3 Regression analysis
4.2 Results and evaluation
4.2.1 Event study results
4.2.2 Regression results
5 Conclusion and critical appraisal
Objectives and Topics
This term paper examines the empirical impact of legal insider purchases and sales on share prices in the German capital market, while simultaneously investigating the determinants of delayed reporting of these transactions post-2004 regulatory updates.
- Analysis of market reactions to corporate insider trading announcements.
- Evaluation of the "theory of efficient capital markets" using event study methodology.
- Examination of reporting delays and the impact of the five-business-day disclosure requirement.
- Investigation of firm-specific and trading-characteristic determinants of delay.
Excerpt from the Book
4.1.2 Event Study Methodology
After the above described data collection, this chapter goes on by depicting the method to investigate and analyse these data set. First of all it has to be clarified how the “Event Study Methodology” exactly is defined. The Event Study is an approach to figure out the impacts of certain events, e.g. merger or earnings announcements or regulatory changes like the women’s quota, on firm values.
These impacts can easily be evaluated because the Event Study Methodology is based on the “theory of efficient capital markets”. This theory says that the market should react immediately if new information comes into the market. This information is only of public nature because the stock market efficiency is semi-strong. The assumption of semi-strong efficiency makes sense in this case because the weak form would provide obsolete information and the strong form would deliver too much and too early insider information and the current investigation on insider announcements and delays would be useless. But under the conditions of semi-strong information efficiency it can easily be measured if there are any effects around a certain event.
The appropriate measure for the extent of impacts is the abnormal return (AR) on a single day or the cumulative abnormal return (CAR) over a period of time. The AR is calculated as the difference of the realised return and the expected return. Appendix 3 shows the related formula. To somehow calculate the expected return it is necessary to take as a basis a certain estimation method. The most obvious one is the market model because it was used in the recent studies this paper refers to as well. The formula for the expected return is shown in appendix 4. Another possibility was the constant mean return model that, as the name already suggests, supposes a constant return of a security for an unlimited period of time.
Summary of Chapters
1 Introduction: Provides an overview of the legal framework surrounding insider trading and outlines the core motivation for investigating its impact on firm valuation.
2 Changes in reporting regulations in Germany: Details the historical evolution of German insider trading regulations, specifically the shift from a vague "without delay" requirement to a stricter five-day reporting window.
3 Literature review: Summarizes prior empirical studies on directors' dealings, emphasizing the relevance of market reactions, information asymmetry, and the influence of company reporting standards.
4 Empirical analysis of insider trading and reporting delay: Presents the data collection, event study methodology, and multivariate regression analysis used to assess abnormal returns and reporting delay determinants.
5 Conclusion and critical appraisal: Reviews the empirical findings, highlights the short-term market impact of insider trades, and identifies limitations regarding event identification and overlapping corporate news.
Keywords
Insider trading, Directors' dealings, Event study, Abnormal return, Corporate governance, Germany, Reporting delay, Capital market efficiency, Market model, Principal-agent problem, Asymmetric information, Stock price impact, Regression analysis, Compliance, Disclosure requirements.
Frequently Asked Questions
What is the core focus of this research paper?
The paper investigates the impact of insider purchases and sales on share prices and analyzes the factors that influence the length of time companies take to report such transactions.
What are the primary fields of study involved?
The study integrates corporate governance, financial market regulation, and empirical quantitative finance.
What is the central research goal?
The objective is to determine if insider trading announcements generate abnormal stock market returns and to evaluate the effectiveness of the updated regulatory reporting deadlines in Germany.
Which scientific methods are applied?
The author utilizes an event study methodology to calculate cumulative abnormal returns and a multivariate regression analysis to isolate determinants of reporting delays.
What is covered in the main body of the paper?
After reviewing existing literature, the paper details the creation of an event-list dataset and performs an analysis of market reactions and delay-contributing factors like firm size and executive involvement.
Which keywords best characterize this work?
Key terms include Insider trading, Directors' dealings, Event study, Abnormal returns, and Reporting delay.
How did the 2004 regulatory changes affect the reporting behavior of firms?
The research concludes that the mandated five-day disclosure requirement contributed to a reduction in reporting delays compared to the previously vague "without delay" rule.
Does firm size significantly influence the delay in reporting trades?
The regression results suggest that under the new five-day regulation, the impact of firm size on reporting delays is largely insignificant, contrasting with findings from earlier periods.
What is the primary characteristic of "serial trades" according to the study?
Serial trades are associated with longer reporting delays because insiders wait to aggregate multiple transactions into a single announcement.
What are the identified "weak spots" of the event study approach?
Limitations include the challenge of assigning an exact event date, the exclusion of low-volume transactions, and potential overlaps with other price-sensitive corporate news.
- Arbeit zitieren
- Anna Rottke (Autor:in), 2016, Insider Trading and Directors‘ Dealings. An empirical investigation of the impacts of insider purchases and sales on share prices and the determinants of delays in their announcements, München, GRIN Verlag, https://www.grin.com/document/1565300
