scholarly journals AN EMPIRICAL STUDY OF INDIVIDUAL INVESTORS’ BEHAVIORAL BIASES IN THE VIETNAMESE STOCK MARKET

2012 ◽  
Vol 15 (1) ◽  
pp. 5-13
Author(s):  
Quan Duc Hoang Vuong ◽  
Phuc Quy Dao
Keyword(s):  
Stock Market ◽  
Behavioral Finance ◽  
Ambiguity Aversion ◽  
Self Control ◽  
Illusion Of Control ◽  
Individual Investors ◽  
Optimism Bias ◽  
Behavioral Biases ◽  
Average Value ◽  
Investment Experience

The study aims to determine individual investors’ behavioral biases at individual level in the Vietnamese stock market and investigate the relationships between mutual behavioral biases, between demographic variables and behavioral biases, between stock investment variables and behavioral biases. This is a quantitative research in behavioral finance with the survey conducted in forms of questionnaire. Each question is a problem which requires investors to make decision. The research finds out that there are specific behavioral biases which influence investors’ investment decisions. Furthermore, there are relationships between gender and illusion of control bias, gender and optimism bias, gender and self-control bias. We also realize relationships between average value per trading times and investment experience, average value per trading times and loss aversion bias, trading frequency and optimism bias, investment experience and optimism bias, monthly income and optimism, age and cognitive dissonance bias. Our findings confirm relationships between mutual behavioral biases mentioned in behavioral finance such as relationships between framing bias and mental accounting bias, illusion of control bias and overconfidence bias. Additionally, we find out relationships between ambiguity aversion bias and confirmation bias.

scholarly journals Disposition Effect and Return Predictability in the Tunisian Stock Market

2017 ◽  
Vol 4 (1) ◽  
pp. 1
Author(s):  
Cheïma Hmida ◽  
Ramzi Boussaidi
Keyword(s):  
Stock Market ◽  
Behavioral Finance ◽  
Stock Prices ◽  
Stock Price ◽  
Return Predictability ◽  
Capital Gains ◽  
Disposition Effect ◽  
Individual Investors ◽  
Long Run ◽  
Return Reversal

The behavioral finance literature has documented that individual investors tend to sell winning stocks more quickly than losing stocks, a phenomenon known as the disposition effect, and that such a behavior has an impact on stock prices. We examined this effect in the Tunisian stock market using the unrealized capital gains/losses of Grinblatt & Han (2005) to measure the disposition effect. We find that the Tunisian investors exhibit a disposition effect in the long-run horizon but not in the short and the intermediate horizons. Moreover, the disposition effect predicts a stock price continuation (momentum) for the whole sample. However this impact varies from an industry to another. It predicts a momentum for “manufacturing” but a return reversal for “financial” and “services”.

Model of Bias-Driven Trend Followers and Interaction with Manipulators

2017 ◽  
Vol 16 (02) ◽  
pp. 573-590
Author(s):  
Ke Liu ◽  
Kin Keung Lai ◽  
Jerome Yen ◽  
Qing Zhu
Keyword(s):  
Financial Markets ◽  
Behavioral Finance ◽  
Real Data ◽  
Investor Behavior ◽  
Individual Investors ◽  
Investment Performance ◽  
Behavioral Biases ◽  
The Common ◽  
And Performance ◽  
Manipulation Detection

Stock investors are not fully rational in trading and many behavioral biases that affect them. However, most of the literature on behavioral finance has put efforts only to explain empirical phenomena observed in financial markets; little attention has been paid to how individual investors’ trading performance is affected by behavioral biases. As against the common perception that behavioral biases are always detrimental to investment performance, we conjecture that these biases can sometimes yield better trading outcomes. Focusing on representativeness bias, conservatism and disposition effect, we construct a mathematical model in which the representative trend investor follows a Bayesian trading strategy based on an underlying Markov chain, switching beliefs between trending and mean-reversion. By this model, scenario analysis is undertaken to track investor behavior and performance under different patterns of market movements. Simulation results show the effect of biases on investor performance can sometimes be positive. Further, we investigate how manipulators could take advantage of investor biases to profit. The model’s potential for manipulation detection is demonstrated by real data of well-known manipulation cases.

scholarly journals Investor Sentiment in the Stock Market

2007 ◽  
Vol 21 (2) ◽  
pp. 129-151 ◽  
Author(s):  
Malcolm Baker ◽  
Jeffrey Wurgler
Keyword(s):  
Stock Market ◽  
Behavioral Finance ◽  
Stock Prices ◽  
Investor Sentiment ◽  
Cash Flows ◽  
Individual Investors ◽  
Individual Investor ◽  
Top Down ◽  
Limits To Arbitrage ◽  
Future Cash Flows

Investor sentiment, defined broadly, is a belief about future cash flows and investment risks that is not justified by the facts at hand. The question is no longer whether investor sentiment affects stock prices, but how to measure investor sentiment and quantify its effects. One approach is “bottom up,” using biases in individual investor psychology, such as overconfidence, representativeness, and conservatism, to explain how individual investors underreact or overreact to past returns or fundamentals The investor sentiment approach that we develop in this paper is, by contrast, distinctly “top down” and macroeconomic: we take the origin of investor sentiment as exogenous and focus on its empirical effects. We show that it is quite possible to measure investor sentiment and that waves of sentiment have clearly discernible, important, and regular effects on individual firms and on the stock market as a whole. The top-down approach builds on the two broader and more irrefutable assumptions of behavioral finance—sentiment and the limits to arbitrage—to explain which stocks are likely to be most affected by sentiment. In particular, stocks that are difficult to arbitrage or to value are most affected by sentiment.

scholarly journals The Impact of Financial Information on Noise Traders: Based on the Perspective of Behavioral Finance

2020 ◽  
Vol 9 (1) ◽  
pp. 28
Author(s):  
Miao Jiang
Keyword(s):  
Stock Market ◽  
Behavioral Finance ◽  
Investor Behavior ◽  
Individual Investors ◽  
Noise Traders ◽  
Healthy Development ◽  
Noise Trading ◽  
Financial Media ◽  
The Impact ◽  
Excessive Noise

<p>In China's incomplete stock market which mainly consists of retail games and short-term operations, both of the high stock turnover rate and P/E ratios reflect excessive noise trading. This article focuses on the characteristic that individual investors are susceptible to financial media information, combined with the development and characteristics of financial media. From the perspective of behavioral finance, this paper analyzes the impact of financial media on noise trading. Using behavioral finance and psychology-related knowledge, investor behavior can be better understood, so as the motivation behind noise trading. Finally, in order to promote the healthy development of the stock market, this paper makes recommendations to improve the efficiency of the capital market.</p>

scholarly journals GROUP BEHAVIORAL BIASES AFFECT FINANCIAL DECISIONS UNLIKE INDIVIDUAL BEHAVIORAL BIASES

2020 ◽  
Vol 15 (1) ◽  
Author(s):  
Marcelo Henriques de Brito ◽  
Paula Esteban do Valle Jardim
Keyword(s):  
Decision Making ◽  
Group Dynamics ◽  
Behavioral Finance ◽  
Institutional Investors ◽  
Group Behavior ◽  
Individual Investors ◽  
Cognitive Errors ◽  
Financial Decisions ◽  
Behavioral Biases ◽  
Group Members

This work presents a new approach to behavioral finance with a theoretical contribution by suggesting and discussing with examples a list of group behavioral biases along with established individual behavioral biases, bringing, hence, an additional outlook on how behavioral biases affect financial decisions. While individual behavioral biases are detected in individuals acting alone, group behavioral biases require the scrutiny of group behavior. This awareness may be particularly important to institutional investors, whose decisions basically stem from a committee or a group that will exhibit behavioral biases depending on how the group members interact between themselves when making a decision, which may include negotiation activities and not necessarily be related to personality or hierarchy. The focus on individual investors deciding on personal investments explain the need of work already developed in behavioral finance, which focus on individual behavioral biases, which may be a consequence from either cognitive errors or emotional biases. However, decisions from institutional investors basically stem from a committee or a group that will exhibit behavioral biases depending on how the group members interact between themselves when making a decision. To address the challenge of identifying causes and consequences for unexpected or unsuitable financial decision-making within a group, this work initially retrieves previous work on individual behavioral biases, linking emotional biases and cognitive errors to the “system 1” and “system 2” decision-making framework. Then, a conceptual contribution of this paper, which may be particularly relevant for institutional investors, is to explain with examples - after research and experience - which are the group behavioral biases and their impact upon financial decisions. Individual behavioral biases already acknowledged in other works on behavioral finance are contrasted in this work to the suggested group behavioral biases. Furthermore, this work suggests that there are two broad types of group behavioral biases: group dynamics biases and information-acceptance biases. Each broad type is subdivided into biases related to the structure of the group and biases related to how the group decision-making procedure occurs. Group dynamics biases related to the manner the group is structured are the following: kin bias (belonging bias), harmony bias, and competition bias. On the other hand, group dynamics biases may be sorted according to five different decision-making procedures, namely: herding, fad bias, Plato bias (denial bias), scarcity bias, and home bias.

scholarly journals Misvaluation and behavioral bias in the Brazilian stock market

2019 ◽  
Vol 30 (79) ◽  
pp. 107-122
Author(s):  
José Bonifácio de Araújo Júnior ◽  
Otávio Ribeiro de Medeiros ◽  
Olavo Venturim Caldas ◽  
César Augusto Tibúrcio Silva
Keyword(s):  
Stock Market ◽  
Behavioral Finance ◽  
Time Window ◽  
Abnormal Returns ◽  
Investment Strategy ◽  
Short Term ◽  
Publicly Traded Companies ◽  
Behavioral Biases ◽  
Three Samples ◽  
Investment Portfolios

ABSTRACT The study sought to apply the model developed by Gokhale et al. (2015) to identify the existence of overreaction and behavioral biases in the Brazilian stock market and analyze its performance as an investment strategy on the São Paulo Stock, Commodities, and Futures Exchange (BM&FBOVESPA) in the short term and long term, as well as test its robustness with time window simulations. The impacts of behavioral finance on capital markets can affect economic decisions, perpetuate or increase asset pricing anomalies, and in more extreme and persistent situations contribute to the formation of bubbles that can compromise the entire financial system of a country. The study pioneers an innovative methodology in the Brazilian stock market for identifying behavioral biases and obtaining abnormal returns and higher returns than the Ibovespa. The research uses the model developed by Gokhale, Tremblay, and Tremblay (2015) in three samples with quotations data for Brazilian publicly-traded companies that compose the Ibovespa and IBrA in the period from 2005 to 2016. With the R statistical software, the Fundamental Valuation Index (FVI) was calculated for each sample share and each year. From the FVI index, the undervalued shares were identified, indicating that the sales price does not reflect their economic fundamentals, and portfolio simulations were carried out for investment over three months or the next year. The results indicate the possible existence of overreaction and behavioral biases in the Brazilian stock market, which lead to the possibility of higher abnormal returns than those of the Ibovespa. Similar to the US market, at the end of the 2006-2016 period simulated portfolios yielded more than 274%, while the Ibovespa yielded approximately 80%. The robustness tests attest to the effectiveness of the model. The various investment portfolios, simulated over different time horizons, yielded more than the Ibovespa on average. The study also confirmed the assumptions of Gokhale, Tremblay, and Tremblay (2015) regarding the model's inadequacy for short-term strategies.

Examining investors' sentiments, behavioral biases and investment decisions during COVID-19 in the emerging stock market: a case of Pakistan stock market

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Shagufta Parveen ◽  
Zoya Wajid Satti ◽  
Qazi Abdul Subhan ◽  
Nishat Riaz ◽  
Samreen Fahim Baber ◽  
...  
Keyword(s):  
Developing Countries ◽  
Stock Market ◽  
Behavioral Finance ◽  
Stock Markets ◽  
Investment Decisions ◽  
Equation Modeling ◽  
Disposition Effect ◽  
Content Type ◽  
Behavioral Biases ◽  
The Impact

PurposeThis study investigates the impact of the COVID-19 pandemic on investors' sentiments, behavioral biases and investment decisions in the Pakistan Stock Exchange (PSX).Design/methodology/approachThe authors have assessed investors' behaviors and sentiments and the stock market overreaction during COVID-19 using a questionnaire and collected data from 401 investors trading in the PSX.FindingsResults of structural equation modeling revealed that the COVID-19 pandemic affected investors' behaviors, investment decisions and trade volume. It created feelings of fear and uncertainty among market participants. Evidence suggests that behavioral heuristics and biases, including representative heuristic, anchoring heuristic, overconfidence bias and disposition effect, negatively influenced investors' decisions at the PSX.Research limitations/implicationsThis study will contribute to behavioral finance literature in the context of developing countries as it has revealed the impact of COVID-19 on the emerging stock market, and its results are generalizable to other emerging stock markets.Practical implicationsThe findings of this study will help academicians, researchers and policymakers of developing countries. Academicians can formulate new behavioral models that can depict the solutions of dealing with an uncertain situation like COVID-19. Policymakers like the Securities Exchange Commission and the PSX can formulate crisis management strategies based on behavioral finance concepts to cope with situations like COVID-19 in the future and help lessen investors' losses in the stock markets. The role of the Securities Exchange Commission is crucial as it regulates the financial markets. It can arrange workshops to educate investors to manage their decisions during crisis time and focus on the best use of irrational and rational decision-making at the same time using Lo (2004) adaptive market hypothesis.Originality/valueThe novelty of the paper is that the authors have introduced overconfidence and disposition effect as mediators that create a connection between representative and anchoring heuristics and investment decisions using primary data collected from investors (institutional and retail) to demonstrate the presence of psychological biases during COVID-19, and it has been done for the first time according to authors' knowledge. It is a contribution and addition to the behavioral finance literature in the context of developing countries' stock markets and their efficiency.

Impact of behavioral factors on investors’ financial decisions: case of the Egyptian stock market

2019 ◽  
Vol 12 (1) ◽  
pp. 30-55 ◽  
Author(s):  
Noura Metawa ◽  
M. Kabir Hassan ◽  
Saad Metawa ◽  
M. Faisal Safa
Keyword(s):  
Stock Market ◽  
Behavioral Finance ◽  
Investor Sentiment ◽  
Investment Decisions ◽  
Demographic Characteristics ◽  
Individual Investors ◽  
Herd Behavior ◽  
Behavioral Factors ◽  
Content Type ◽  
Positive Effects

Purpose This paper aims to investigate the relationship between investors’ demographic characteristics (age, gender, education level and experience) and their investment decisions through behavioral factors (sentiment, overconfidence, overreaction and underreaction and herd behavior) as mediator variables in the Egyptian stock market. Design/methodology/approach This paper collects data from a structured questionnaire survey carried out among 384 local Egyptian, foreign, institutional and individual investors. This paper used a partial multiple regression method to analyze the effect of investors’ demographic characteristics on investment decisions through behavioral factors as the mediator variable. Findings Investor sentiment, overreaction and underreaction, overconfidence and herd behavior significantly affect investment decisions. Also, age, gender and the level of education have significant positive effects on investment decisions by investors. Experience does not play a significant role in investment decisions, but as investors gain experience, they tend to overlook the emotional factors. Practical implications The findings of this paper would help to understand common behavioral patterns of investors and indicate a path toward the growth of the Egyptian stock market. Originality/value There is a lack of research in behavioral finance covering Middle East and North African markets. This paper attempts to fulfill the gap by analyzing behavioral factors in the Egyptian market.

scholarly journals The Impact of Behavioral Biases on Herding Behavior of Investors in Islamic Financial Products

2021 ◽  
Vol 11 ◽  
Author(s):  
Sajid Mohy Ul Din ◽  
Shabra Khalid Mehmood ◽  
Arfan Shahzad ◽  
Israr Ahmad ◽  
Alla Davidyants ◽  
...  
Keyword(s):  
Behavioral Finance ◽  
Positive Impact ◽  
Theoretical Perspective ◽  
Illusion Of Control ◽  
Herding Behavior ◽  
Information Availability ◽  
Behavioral Biases ◽  
Mediating Role ◽  
Financial Products ◽  
The Impact

The study aimed to investigate the impact of behavioral biases on herding for Islamic financial products with the mediation of shariah literacy. An adopted questionnaire from several published studies was used to collect data. The data were collected from 410 respondents and were analyzed with SmartPLS. The results for the direct impact showed that self-attribution, illusion of control, and information availability have a positive and significant impact on herding for Islamic financial products while shariah literacy showed an insignificant impact on herding. The results for mediation showed that previously significant and positive impact turned to insignificant when shariah literacy was introduced as mediating variable between the illusion of control, self-attribution, information availability, and herding. From a theoretical perspective, this study would contribute to the existing body of knowledge of financial decision making from shariah literacy point-out. On the other hand, the findings of this study may be useful for investors to avoid herding in the Islamic financial markets. The authors synthesize the contribution made by behavioral finance studies in extending the knowledge of herding behavior in Islamic financial products with a mediating role of shariah literacy. The key limitation of the study includes data that were collected from three districts of Punjab, Pakistan.

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