Tác động của các yếu tố vĩ mô đến biến động thị trường chứng khoán tại Việt Nam

Nghiên cứu tác động của các yếu tố vĩ mô đến biến động thị trường chứng khoán có điều kiện tại Việt Nam trong luận văn thạc sĩ UEH.

Chuyên ngành

Banking and Finance

Người đăng

Ẩn danh

Thể loại

Master Thesis

2011

60
0
0

Phí lưu trữ

30 Point

Mục lục chi tiết

1. CHƯƠNG 1: Introduction

1.1. Introduction

1.2. Research problem

1.3. Research objectives

1.4. Research methodology and scope

1.5. Structure Of The Study

2. CHƯƠNG 2: Literature review

2.1. Introduction

2.2. ARCH and GARCH model

2.2.1. Autoregressive Conditional Heteroskedasticity (ARCH)

2.2.2. Generalized Autoregressive Conditional Heteroskedasticity (GARCH)

2.3. The impact of macroeconomic variables on stock market volatility

2.3.1. Inflation

3. CHƯƠNG 3: Research Methodology

3.1. Research data and construction of variables

3.2. Construction of variables for the models

3.3. DF unit root test

3.4. Hypotheses and empirical models

3.4.1. Model 1: The standard GARCH (1,1) model

3.4.2. Applying GARCH (1,1) models to find out the impact of macroeconomic variables on stock return volatility

4. CHƯƠNG 4: Empirical Results of the Research

4.1. DF unit root test

4.2. Correlation Matrix of the variables

4.3. Empirical result of model

4.3.1. Model 1: Standard GARCH (1,1)

5. CHƯƠNG 5: Conclusions, Limitations and Recommendations

5.1. Conclusions and Implications

5.2. Limitations and recommendations

Trích đoạn nội dung tài liệu

1 MINISTRY OF EDUCATION AND TRAINING UNIVERSITY OF ECONOMICS HOCHIMINH CITY --- oOo --- NGUYỄN THÚY VÂN THE IMPACT OF MACROECONOMIC FACTORS ON CONDITIONAL STOCK MARKET VOLATILITY IN VIETNAM MAJOR: BANKING AND FINANCE MAJOR CODE: 60.12 MASTER THESIS INSTRUCTOR: Doctor TRƯƠNG QUANG THÔNG Ho Chi Minh City – 2011 LUAN VAN CHAT LUONG download : add luanvanchat@agmail.com 2 ACKNOWLEDGEMENT Firstly, I would like to express my sincerest gratitude to my supervisor, Dr. Truong Quang Thong for his valuable guidance and helpful comments during the course of my study. I also would like to thank all of my lecturers at Faculty of Banking and Finance, University of Economics Hochiminh City for their English program, knowledge and teaching during my master course at school. I would like to specially express my thanks to my classmates, my friends for their support and encouragement. Special thanks should go to my family for their love and support during my life. LUAN VAN CHAT LUONG download : add luanvanchat@agmail.com 3 ABSTRACT The study looks at the relationship between macroeconomic factors and and stock market, and determined whether inflation, movements in exchange rate, interst rate have an effect on stock market return volatility in Vietnam. The Generalised Autoregressive Conditional Heteroskedascity (GARCH) models are used in establishing the relationship between these variables and stock market volatility. The results confirms presence of GARCH (1,1) effect on stock return time series of Vietnam stock market. It is also found that there is strong and positive relationship between inflation and stock market return volatility. It means that an increase in inflation leads to an increase in stock market return volatility in the long run. However, there is no enough proof to conclude that change in interest rate and exchange rate can influence market return volatility. Keywords: volatility, leverage, interest rate, inflation, exchange rate, returns, Hochiminh Stock Exchange LUAN VAN CHAT LUONG download : add luanvanchat@agmail.com i Table of contents  CHAPTER 1 Introduction .4 Research methodology and scope .5 Structure Of The Study.4 CHAPTER 2 Literature review .2 ARCH and GARCH model .1 Autoregressive Conditional Heteroskedasticity (ARCH) .2 Generalized Autoregressive Conditional Heteroskedasticity (GARCH) 8 2.3 The impact of macroeconomic variables on stock market volatility .4 Application of Garch model in Vietnam .15 CHAPTER 3 Research Methodology .2 Research data and construction of variables: .16 LUAN VAN CHAT LUONG download : add luanvanchat@agmail.2 Construction of variables for the models: .3 DF unit root test:.4 Hypotheses and empirical models .1 Model 1: The standard GARCH (1,1) model .2 Applying GARCH (1,1) models to find out the impact of macroeconomic variables on stock return volatility .28 CHAPTER 4 Empirical Results of the Research .3 DF unit root test .4 Correlation Matrix of the variables .5 Emprical result of model .1 Model 1: Standard GARCH (1,1) .37 CHAPTER 5 Conclusions, Limitations and recommendations .2 Conclusions and Implications .3 Limitations and recommendations: .45 LUAN VAN CHAT LUONG download : add luanvanchat@agmail. Descriptive Statistics of variables . Monthly CPI from 2000 – 2010 (Source: GSO) . Unit root test .1 The performance of VN-Index from 07/2000 – 12/2010 .2 Inflation in Vietnam and selected countries 2000 - 2009 .3 Vietnam‟s nominal exchange rate (VND/USD) and inflation rate 1992-2010.1 Vietnam exchange rate arrangement 2000 - 2010 .1 Descriptive statistics of variables (07/2000 – 12/2010) .2 ADF UNIT ROOT TEST .3 Correlation Matrix of the variables .4 Result of model 1 .5 Result of model 2 .6 Result of model 3 .7 Result of model 4 .8 Result of model 5 .37 LUAN VAN CHAT LUONG download : add luanvanchat@agmail.com iv Glossary CPI: consumer price index SBV: State Bank of Vietnam GARCH: Generalized AutoRegressive Conditional Heteroskedasticity ARCH: Autoregressive Conditional Hetroskedasticity GDP: Gross Domestic Product HOSE: Hochiminh Stock Exchange LUAN VAN CHAT LUONG download : add luanvanchat@agmail.com 1 CHAPTER 1 Introduction 1.1 Introduction Stock return volatility refers to the variation in stock price changes during a period of time. Normally investors and agents perceive this variation as a measure of risk. The policy makers use estimate of volatility as a tool to measure the vulnerability of the stock market. Since understanding the nature of stock market volatility gives important implications for policy makers and investors, movements in stock prices volatility have been the central variable of many researches. There have been numerous of studies trying to answer an interesting question: what are the factors that derive stock market volatility. Researchers have analyzed the relative importance of economy-wide factors, industry-specific factors, and firm-specific factors stock volatility. One of the earliest studies was of Officer (1973) which related changes in stock market volatility to changes in real economic variables. He noted that variability in stock prices was unusually high during the period of great depression i. 1929-1939 compared with pre-and post-depression periods. Schwert (1989) was a classic study which intended to verify Officer‟s (1973) findings and explored the relationship between stock prices volatility and macroeconomic variables. This issue has been studied by numerous researches and their findings are not the same. Many papers of Engle and Rangel (2005), Campbell (1987) and Shanken (1990)…confirmed that macroeconomic factors had significant effect on stock market volatility. Contrary to this, Davis and Kutan (2003), Schwert (1989) evidenced that macroeconomic variables had weak predictive power for explaining variability of stock market prices and returns volatility. Inconsistent LUAN VAN CHAT LUONG download : add luanvanchat@agmail.com 2 results depend on different characteristics of every countries as well as different time periods. Since ARCH model was proposed by Engle (1982) and generalized by Bollerslev (1986) and Taylor (1986), the models have been proved to be sufficient in capturing properties of time varying stock return volatility. Literatures have found evidence in support the capability of GARCH models in volatility estimation as well as volatility forecast. Vietnam stock market was newly established in 2000 in Ho Chi Minh City on 28 July 2000 (Hochiminh Stock Exchange – HOSE). In the first trading session there were only two stocks with a total market capitalization of 270 billion VND. Although the market has significantly grown over ten years of operation (until at the end of 2010), it is still rather small and incomplete in comparison to other stock markets in the Asian region. Moreover, interest rate, inflation, exchange rate and stock market are hot subjects attracting attention of the government, investors and corporations in recent years. Relationship among these macroeconomic variables as well as their effect on stock market has been discussed every day. In fact, in Vietnam, do inflation, interest rate and exchange rate impact on stock market? Can we measure this impact? 1.2 Research problem Research and practice have proved the important role of macroeconomic variables on the economy. Stock market volatility is known as one of the most important phenomena that determine the amount of risk faced by investors. The impact of macroeconomic factors on stock market including market volatility is a major question to be posed and tested in many countries around the world. However, as far as the author is concerned, in Vietnam there were not many researches exploring this issue. In addition, unlike the stock market in the developed countries, Vietnam's stock market is not really operating under the law of supply and demand but it is influenced LUAN VAN CHAT LUONG download : add luanvanchat@agmail.com 3 by herb behavior and "crowd effect". Therefore, no one can confidently confirm that changes in macroeconomic factors impact to the entire stock market. Moreover, inflation, exchange rate, interest rate and stock market are hot topics in recent years. As the importance of volatility as a proxy of risk, the advantages of GARCH family and Vietnam stock market‟s particular situation mentioned above, the paper chooses to study the impact of inflation, exchange rate and interest rate to stock market volatility by applying GARCH models. My study will try to answer the following questions: What macroeconomic determinants of stock market volatility in Vietnam are? And how they specifically affect the stock market? 1.3 Research objectives The main purpose of this study is to identify factors that impact stock market conditional volatility using the data from Hochiminh Stock Exchange. The present study contributes to the literature in three ways. Firstly, the present study will shed some light on the depth of the stock market activities especially in emerging market in addition to identifying and relating the changes in economic factors to the changes in stock market movements. It is necessary to have more and more researches about Vietnam stock market so that we can understand and develop our immature stock market. Secondly, the findings of this investigation should enable the investors to know about stock market volatility as a measure of risk and make their decision. Finally, the study will help the policy makers in seeing the effect of their policy to stock market and choosing in which way they should adjust their policy.4 Research methodology and scope To achieve the above mentioned objectives, the author employs quantitative research by using data of Hochiminh Stock Exchange Index (VNIndex), inflation, LUAN VAN CHAT LUONG download : add luanvanchat@agmail.com 4 exchange rate and interest rate from period August 2000 to December 2010. The analysis includes the following steps:  Descriptive statistics  Using DF unit root test to test stationary of time series data  Using standard Generalized AutoRegressive Conditional Heteroskedasticity (GARCH) models as proposed by Bollerslev (1986) and Nelson (1991) to capture the time varying volatility of stock market returns in Vietnam.  Applying GARCH model with additional dependent variables as inflation, exchange rate and interest rate to find out whether these variables effect stock market returns in Vietnam or not. Eviews software version 6 is used as data analysis tool.5 Structure Of The Study This study including five chapters is organized as follows: CHAPTER 1: Introduction This chapter introduces research background of the study, research problems, research objectives, research methodology and scope. CHAPTER 2: Literature Review In this chapter, I review the relevant literatures and present the fundamental ideas on effect of macroeconomic variables on stock volatility as well as Garch model. CHAPTER 3: Research Methodology After determining the research objectives and scope, research methodology concerned in chapter 1 and referring important previous literatures in chapter 2, this LUAN VAN CHAT LUONG download : add luanvanchat@agmail.com 5 chapter particularly outlines the research methodology, data and builds empirical models. CHAPTER 4: Empirical Results of the Research Chapter 4 presents the empirical results, discusses the implications of the findings CHAPTER 5: Conclusions, Limitations and Recommendations In this chapter, I present conclusions and recommendations based on the results of the previous chapters. The limitations of the research and recommendations for future researches are also given. LUAN VAN CHAT LUONG download : add luanvanchat@agmail.com 6 CHAPTER 2 Literature review 2.1 Introduction This chapter will review previous researches that related to GARCH model, the impact of macroeconomic variables on stock market volatility. Among macroeconomic factors, I will focus on three factors supposed by many studies, namely inflation, interest rate and exchange rate. In addition, literatures that evidenced GARCH effect in Vietnam stock market are also provided.2 ARCH and GARCH model Stock return volatility refers to the variation in stock price changes during a period of time. Investors and agents perceive this variation as a measure of risk. According to Pindyk (1984), an unexpected increase in volatility today leads to the upward revision of future expected volatility and risk premium which further leads to discounting of future expected cash flows (assuming cash flows remain the same) at an increased rate which results in lower stock prices or negative returns today. Stock return volatility, therefore, refers to variations in stock price changes during a period of time. To forecast the conditional variances, Autoregressive Conditional Hetroskedasticity (ARCH) model was introduced by Engle (1982) and generalized as GARCH (Generalized ARCH) by Bollerslev (1986) and Taylor (1986).

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