Hành Vi Herding Trong Thị Trường Chứng Khoán Việt Nam: Bằng Chứng Thực Nghiệm Từ Phân Tích Hồi ...

Luận văn thạc sĩ nghiên cứu ueh herding behavior in vietnamese stock market empirical evidence from quantile regression analysis, khảo sát thực trạng, phân tích nguyên nhân, đề

Chuyên ngành

Master Of Business

Người đăng

Ẩn danh

Thể loại

graduation project

2015

78
1
0

Phí lưu trữ

30 Point

Mục lục chi tiết

1. CHƯƠNG 1: INTRODUCTION

1.1. Research methodology and scope

2. CHƯƠNG 2: LITERATURE REVIEW

2.1. Theoretical literature review

2.2. Empirical literature review

2.3. Measuring herding in financial markets

3. CHƯƠNG 3: RESEARCH METHODOLOGY

3.1. Data collection and sample description

3.2. Regression model for testing the hypotheses

3.2.1. Regression model for testing the presence of herding behavior in Vietnamese stock market

3.2.2. Regression model for estimation the degree of herd in rising and falling market

3.3. Quantile regression analysis

4. CHƯƠNG 4: EMPIRICAL RESULT

4.1. Correlation analysis among variables

4.2. Evidence on herd presence in Vietnamese stock market

4.3. Herding behavior in up and down markets

4.4. Regression result from Quantile regression analysis

5. CHƯƠNG 5: CONCLUSION AND IMPLICATIONS

5.1. Implications of herding behavior in Vietnamese stock market

5.2. Limitations and further research direction

Trích đoạn nội dung tài liệu

UNIVERSITY OF ECONOMICS HO CHI MINH CITY International School of Business -------------------------- Phan Dang Bao Anh HERDING BEHAVIOR IN VIETNAMESE STOCK MARKET: EMPIRICAL EVIDENCE FROM QUANTILE REGRESSION ANALYSIS MASTER OF BUSINESS (Honours) Ho Chi Minh City – Year 2015 LUAN VAN CHAT LUONG download : add luanvanchat@agmail.com UNIVERSITY OF ECONOMICS HO CHI MINH CITY International School of Business -------------------------- Phan Dang Bao Anh HERDING BEHAVIOR IN VIETNAMESE STOCK MARKET: EMPIRICAL EVIDENCE FROM QUANTILE REGRESSION ANALYSIS ID: 22130006 MASTER OF BUSINESS (Honours) SUPERVISOR: A. VO XUAN VINH Ho Chi Minh City – Year 2015 LUAN VAN CHAT LUONG download : add luanvanchat@agmail.com ACKNOWLEDGEMENT Firstly, I would like to express my gratefulness to my supervisor A.Vo Xuan Vinh for his professional guidance, intensive support, valuable suggestions, instructions and continuous encouragement during the time of research and writing this thesis. I would like to express my deepest appreciation to ISB Research Committee for their valuable time as their insightful comments and meaningful suggestions were contributed significantly for my completion of this research. My sincere thanks also go to all of all of my lecturers at International Business School- University of Economics Ho Chi City for their teaching and guidance during my Master course. Last but not least, I would like to thanks my family, whom were always supporting me and encouraging me with their best wishes. LUAN VAN CHAT LUONG download : add luanvanchat@agmail.com TABLE OF CONTENT CHAPTER 1: INTRODUCTION. Research methodology and scope . 7 CHAPTER 2: LITERATURE REVIEW .1 Theoretical literature review . Empirical literature review . Measuring herding in financial markets . 25 CHAPTER 3: RESEARCH METHODOLOGY . Data collection and sample description . Regression model for testing the hypotheses .1 Regression model for testing the presence of herding bahavior in Vietnamese stock market:.2 Regression model for estimation the degree of herd in rising and falling market: . Quantile regression analysis . 31 CHAPTER 4: EMPIRICAL RESULT .2 Correlation analysis among variables . Evidence on herd presence in Vietnamese stock market .2 Herding behavior in up and down markets .4 Regression result from Quantile regression analysis . 39 LUAN VAN CHAT LUONG download : add luanvanchat@agmail.com CHAPTER 5: CONCLUSION AND IMPLICATIONS . Implications of herding behavior in Vietnamese stock market . Limitations and further research direction . 55 LUAN VAN CHAT LUONG download : add luanvanchat@agmail.com LIST OF TABLES Table 1.1: A summary of empirical evidence on herding behavior .1: Summary of data observations used in the study .1: Descriptive statistics for daily market return and cross-sectional absolute deviation (CSAD) for the Vietnamese stock market from 1/2005 to 4/2015 . Correlation among main variables .3: Regression result of herding behavior in Vietnamese stock market .4: Regression results of herding behavior in rising and declining market .5: Analysis of herding behavior in Vietnamese stock market by quantile regression.6: A summary of research results . 43 LUAN VAN CHAT LUONG download : add luanvanchat@agmail.com 1 ABSTRACT This study examines the herding behavior of investors in Vietnamese stock market using data sample of 299 companies listed on Ho Chi Minh City Stock Exchange. Using a least square method, the author finds evidence of herding presence in rising and falling market when considering over the period of 2005 – 4/2015 as well as in the periods of pre-crisis and post-crisis. By applying quantile regression analysis to estimate the herding equation, the author find supporting evidence of herding during the period studied as well as when splitting the market into two sub-periods; however, the level of this trend is somewhat different conditional on quantile region. Key words: herding behavior, Vietnamese stock market, quantile regression, asymmetry. LUAN VAN CHAT LUONG download : add luanvanchat@agmail.com 2 CHAPTER 1: INTRODUCTION This chapter presents the introduction of the study. It contains the research background, research gap, research objectives, research methodology and scope and research structure. Research background Traditional financial framework understands financial market by using models which meet four foundation conditions: (i) investors are assumed to be rational, (ii) market is efficient, (iii) investors make a decision on portfolios based on the rules of mean-variance portfolio theory, and (iv) the expected returns are a function of risk (Statman, 2014). Among them, the condition of rational investor is considered a central assumption in which people make decisions reasonably and no biases in their future prediction. However, the world economy has been shaken by the global financial crisis in 2008, which originated from US and then expanded globally. As soon as the crisis began, many economists and financial forecasters were no longer able to analyze the bankruptcy of a variety of enterprises or banks in an intensive way. The Vietnamese stock market is not an exception. From its foundation in 2000, the Vietnamese stock market experiences “hot” growth and drastical fluctuation without stability causing virtual stock matter. The value of VN-Index in 2000 of 100 points increases to 571 points after just one year and a half which astonishes economic experts; however, this increment does not last long and rush to fall under 140 points in 2003, 150-200 points in 2004. The peak of growing phase is in the period of 2006- 2007 as Vietnamese stock market has the highest growth of 1100 points (approximately 145%) in Asia – Pacific region, even exceeding the Shanghai stock market growth of 135%. Particularly, the VN-Index reaches to the record of 1170.67 points on March 12th, 2007 – the highest level in the world. This event makes stock experts and market managers difficult to understand, thereby bring out the fear of bubble formation in the stock market. LUAN VAN CHAT LUONG download : add luanvanchat@agmail.com 3 After a long time of increasing prices, the Vietnamese stock market has signal to considerably decrease with the lowest record of 236 points on February 24th, 2009. The happening in the market during this period is very complicated to anticipate. Once again, economics experts doubt the precision of the efficient market theory. A paradox is present that when the stock price is driven further from the fundamental value of 30% investors still trade constantly; whereas, when the stock prices decrease at an attractive level in declining market investors massively sell stocks instead of buying. Is it true that the Vietnamese stock market operation does not abide by any rules or there are phenomena dominating the market which cause an unusual fluctuation? Failure of the economists as well as their theories leads to a list of different questions in different context: Are people rational? Or are they influenced by emotion such as fear, greed which caused wrong decision? Then, a new branch of financial research appears beside traditional financial framework which helps economic experts and finance researchers partial explain unusual fluctuation. Behavioral finance is a new strand of finance which investigates the behavior of investors in financial market; in other word, it is a combination between psychology and finance. It considers psychological factors as essential input to financial analysis. Behavioral finance can elucidate several financial reactions that contrast with standard financial theory and can thus make a contribution to avoidance of mistakes as well as advancing investment strategies (Fromlet, 2001). Previous researchers put sustained effort to understand investors’ behaviour in the market as well as its impact on stock price. These investment behaviors are influenced by some factors such as investors’ insight, criterion to measure investment efficiency or market instability… In terms of psychology, investors are assumed to be rational and always strive to optimize their actions but the fact that the rationality appears to be inhibited by numerous cognitive biases, such as overconfidence, over- optimism, herding, representativeness … and so on. In this research, the author focuses on the investment behavior of market participants regarding to their tendency to follow the actions of others, which engages in herd behavior. LUAN VAN CHAT LUONG download : add luanvanchat@agmail.com 4 Herding behavior is defined as the trend of investors to imitate the actions of others (Luu, 2013). This tendency is considered an inherent psychology of investors but it becomes stronger as they have to make decision in a market condition with high uncertainty and low transparency. Over last decades, research regarding this topic receives an attention from scientists and empirical researchers. A numerous theories are developed and empirical investigations are conducted to examine the presence and reasons of this phenomenon in financial market. Researchers in this field believe that the presence of herding behavior has impact on results derived from asset pricing model because it influences stock price fluctuation, thus influencing risk and return of stocks (Tan et al, 2008). Similar to speculation, herding behavior may be rational or irrational. If market participants follow market consensus, the fluctuation is more and more serious that can leads to instability in financial system, particularly in the period of global crisis. In addition, herding behavior lasting so long can drive the stock prices further fundamental value which causes destabilization. If investors are dominated by sentiment such as greedy or fear of loss, they can trade in a “frenzied” way; as a results, economic bubbles are created and may collapse the stock market. In sum, herding behavior can lead to bad consequences of reducing the efficiency of market, even result in the market instability and financial collapse. Basing on these arguments, doing research about herding behavior can help investors have an objective overview and be prudent when making investment decision. Therefore, the author decides to do a research of “Herding behavior in Vietnamese stock market: an empirical evidence from Quantile regression analysis”. The study applies research model proposed by Chang, Cheng and Khorona (2000) and modified by Chiang et al (2010) to investigate the presence of herd in Vietnamese stock market. Research gap Several empirical studies have examined and detected the herding behavior in many region throughout the world, form developed to emerging countries. For LUAN VAN CHAT LUONG download : add luanvanchat@agmail.com 5 example: Chang et al. (2000) find evidence of herding in Japan and South Korea but no detection of herd in US and Hong Kong, Fu and Lin (2010) detect the presence of herd in Chinese stock market which was in accordance with the results from Zhou (2007) and Zhao (2011), Caparrelli, D’Arcangelis and Cassuto (2010) find the evidence of herd in Italian stock market and Caporale, Economou and Phillipas (2008) prove the existence of this trend in Athen, Greece…. In Vietnam, there are a little research test for the existence of this tendency applying different model for detection. Nevertheless, previous research concentrates on using Ordinary Least Square (OLS) method to regress their model, which consists of a few drawbacks that may lead to wrong results. Tran and Truong (2011) overcome this situation by using a more powerful approach called GARCH; however, this method is still not optimal and complicated in processing data. The new point of this study is the choice of methodology. Instead of standard method of OLS and dummy variable models which are pronounced in earlier literature review, this research utilizes the model of Chang et al (2000) and applies quantile regression analysis in empirical investigation. Quantile regression is considered a valid alternative to the estimation of herding model such as Christie and Huang (1995) and Chang et al (2000) (Jani, 2008). In addition, preceding research investigated herding during very old period, usually from the formation of stock market in Vietnam to five years later. At that time, the number of securities was extremely small, even there were only 5, 10 and 20 stocks listed in the Vietnamese stock market in 2000, 2001 and 2002, respectively. The data set of this research is collected from 2005, when Vietnamese stock market marked an impressive growth, until now, in which the market is gradually matured. The purpose of gathering the data set over the new period is to indicate a precise result with current condition of Vietnamese stock market.Research objectives LUAN VAN CHAT LUONG download : add luanvanchat@agmail.

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