scholarly journals PENGUJIAN EFISIENSI PASAR MODAL BENTUK LEMAH DI BURSA EFEK JAKARTA PERIODE JANUARI-JULI 2001

2002 ◽  
Vol 1 (1) ◽  
Author(s):  
Merlina Widjaja ◽  
Endang Ernawati
Keyword(s):  
Market Efficiency ◽  
Capital Market ◽  
Abnormal Return ◽  
Stock Exchange ◽  
Weak Form ◽  
Ratio Test ◽  
Variance Ratio ◽  
Significance Level ◽  
Run Test ◽  
The Capital Market

Since 1988, Indonesian capital market, especially Jakarta Stock Exchange has been grown fast. Then, come up questions about capital market efficiency. The capital market is efficient if the securities prices reflecting all available informations and the prices are fair. Thus, investor could not achieve abnormal return. So, with this reasons and facts, the research analyze weak form Indonesia capital market efficiency at Jakarta Stock Exchange in periode January-July 2001. This research used samples 25 emitent. Autocorrelation test, run test, and variance ratio test were used to test the capital market efficiency. The result is that Indonesian capital market is efficient in weak form with 1% significance level. It means that securities movement have random walk pattern. Thus, investors could not achieve abnormal return if just used technical analysis with past securities prices data to predict prices in the future.

scholarly journals The market efficiency of the Tanzania stock market

2016 ◽  
Vol 11 (3) ◽  
pp. 75-86 ◽  
Author(s):  
Josephine Njuguna
Keyword(s):  
Stock Market ◽  
Market Efficiency ◽  
Unit Root ◽  
Stock Exchange ◽  
Unit Root Test ◽  
Weak Form ◽  
Ratio Test ◽  
Variance Ratio ◽  
Test Unit ◽  
Variance Ratio Test

The purpose of this article is to examine the efficiency of the Tanzania stock market. The study attempts to answer whether the Tanzania stock market is weak-form efficient. The study applies a battery of tests: the serial correlation test, unit root tests, runs test and the variance ratio test using daily and weekly data with a sample spanning from November 2006 to August 2015 for the Dar es Salaam Stock Exchange (DSE) all share index and from January 2009 to August 2015 for the DSE share index. Overall, the results of the market efficiency are mixed. The serial correlation test, unit root test and the runs test do not support weak-form efficiency, while the more robust variance ratio test supports weak-form efficiency for the DSE. The main contribution of the study is that the market efficiency of the Tanzania stock market has increased over the sample period. Keywords: adaptive market hypothesis, efficiency market hypothesis, serial correlations test, unit root test, runs test, variance ratio test, Dar es Salaam Stock Exchange. JEL Classification: G14, G15

scholarly journals How efficient is the Johannesburg Stock Exchange really?

2018 ◽  
Vol 21 (1) ◽  
Author(s):  
André Heymans ◽  
Leonard Santana
Keyword(s):  
Stock Exchange ◽  
Weak Form ◽  
Active Management ◽  
Sign Test ◽  
Management Approach ◽  
Ratio Test ◽  
Variance Ratio ◽  
Johannesburg Stock Exchange ◽  
Portfolio Managers ◽  
The Impact

Background: There are various studies that confirm the efficiency of the Johannesburg Stock Exchange (JSE), implying that there are no opportunities for active portfolio managers to earn excess returns over the long run.Aim: The aim of the research is to prove that the sub-indices on the JSE go through cycles of efficiency and inefficiency even though the JSE as a whole might be considered informationally efficient.Setting: Although the JSE as a whole can be considered to be weak-form efficient, portfolio managers are not bound to investing in large liquid stocks alone. Many aggressive funds allow managers to also allocate a portion of their portfolio to smaller stocks. This has implications when considering the efficiency of the stocks being selected.Methods: Given the impact efficiency has on portfolio selection, we test for the adaptive market hypothesis using a representative sample of stock indices by means of the automatic variance ratio test, the Chow–Denning joint variance ratio and the joint sign test on the JSE.Results: Our results confirm that some of the smaller, and in some instances younger, indices are not always as efficient as the all share index, thus allowing portfolio managers with an active management approach some opportunities to profit from informational inefficiencies in the market.Conclusion: The practice of active management by portfolio managers in the South African market seems to defy logic if one considers the fact that the JSE as a whole is at the very least weak-form efficient. By proving that some of the sub-indices that make up the all share index are inefficient most of the time, this article shows that the phenomenon of active portfolio managers is less of a surprise.

scholarly journals An Empirical Analysis for Abnormal Returns from Initial Public Offerings (IPOs): evidence of Iranian oil and chemical industries

2013 ◽  
Vol 3 (1) ◽  
pp. 143 ◽  
Author(s):  
Mahdi Filsaraei ◽  
Alireza Azarberahman ◽  
Jalal Azarberahman
Keyword(s):  
Initial Public Offerings ◽  
Capital Market ◽  
Abnormal Return ◽  
Stock Exchange ◽  
Abnormal Returns ◽  
Going Public ◽  
Significance Level ◽  
Public Offerings ◽  
Positive Abnormal Return ◽  
Chemical Companies

Purpose: The core purpose of this paper empirically study of the initial public offerings (IPOs) of companies accepted in oil and chemical industries. The paper attempts to answer the question of is there any abnormal return from IPOs in listed companies in Tehran Stock Exchange (TSE).Design/methodology/approach: This research is an applied research, and its design is empirical, which is done by the method of post-event (past information). For the purpose of the study the t-statistic, regression and variance analyses are applied to examine the hypotheses. We use in the analyses a sample of 29 newly accepted Iranian oil and chemical companies listed on TSE for the period of 2001 to 2012. This paper has studied abnormal return and three abnormal phenomena have been considered in capital market. These phenomena consist: (1) underpricing or overpricing of the firm's stock, (2) lower or higher stock return of the firms and (3) Particular period in market for stock transactions volume.Findings: The results support the hypothesis that there is a positive abnormal return to investing in the newly accepted oil and chemical firms for stockholders. It also shown the firm size is the only factor that can affect the stock abnormal return. With considering significance level, investors have to give attention sequentially to other variables such as stock ownership centralization, going public time and stock offering volume.

MARKET EFFICIENCY IN G-20 COUNTRIES: THE PARADOX OF FINANCIAL CRISIS

2013 ◽  
Vol 08 (01) ◽  
pp. 1350003 ◽  
Author(s):  
JOÃO PAULO VIEITO ◽  
K. V. BHANU MURTHY ◽  
VANITA TRIPATHI
Keyword(s):  
Financial Crisis ◽  
Market Efficiency ◽  
Stock Markets ◽  
Abnormal Returns ◽  
Weak Form ◽  
Ratio Test ◽  
Variance Ratio ◽  
Crisis Period ◽  
The World ◽  
Variance Ratio Test

This paper is amongst the first to investigate weak-form efficiency of the most developed (G-20) countries in the world. It also measures the impact of the 2007 financial crisis on the stock markets of these countries, in terms of their efficiency. Serial correlation test, ADF unit root test, Lo and MacKinlay (1988) variance ratio test, Chow and Denning (1993) RWH test and Wrights' 2000 ranks and signs based multiple variance ratio test were utilized to carry out this analysis. The entire study period was divided into a pre-crisis period (January 1, 2005 – August 8, 2007) and a during crisis period (August 9, 2007 – Deccember 31, 2011). Strong contemporaneous effects emerged across all international markets (except Saudi Arabia) as a consequence of the 2007 crisis. This may be due to increased international intra-day activity across the world markets. It was concluded that the "Samuelson dictum," which states that "while individual stocks are efficient, the market index is inefficient," seems to hold good on a global level by analogy. This is evident on the premise that, on the whole the 2007 crisis reduced return and increased volatility, even though individual markets became more efficient. The most robust result from the analysis is that most of the individual markets are weak-form efficient. Following the crisis of 2007, the methodology used indicates that on the whole, the market efficiency of individual stock markets improved.Hence, during the pre-crisis, volatility was low but heteroskedastic. However, during the period of the crisis, volatility was high but homoscedastic. The heightened volatility and low return that are a consequence of the crisis coupled with improved market efficiency, due to market vigil and control, ensure that abnormal returns and persistent arbitrage possibilities are wiped out. This appears to be a paradox of a crisis.

scholarly journals The Capital Market Reaction To The Corona Covid-19 Virus Outbreak Events

Academia Open ◽  
2021 ◽  
Vol 3 ◽  
Author(s):  
Wardah Azizah ◽  
Nurasik
Keyword(s):  
Capital Market ◽  
Abnormal Return ◽  
Market Reaction ◽  
Stock Exchange ◽  
Abnormal Returns ◽  
T Test ◽  
Paired Sample ◽  
Significant Difference ◽  
Real Picture ◽  
The Capital Market

This study aims to get a real picture of the Capital Market Reaction to the Corona Covid-19 Virus Outbreak (Study on LQ-45 Companies Listed on the Indonesia Stock Exchange). The analytical tool used is descriptive statistical analysis and classical assumption test. To test the hypothesis, it is done using data analysis in the form of Paired Sample T-Test using the statistical program "Product and Service Solution" (SPSS). The results of hypothesis testing using paired sample t-test obtained t-value with a significant value of 0.000 (0.000 <0.05). From these results, it can be stated that the hypothesis is accepted, which means that there is a significant difference in abnormal returns before and after the Corona / Covid-19 Virus Outbreak. The difference in Abnormal Return on the test results has a positive value, this shows that if the Corona / Covid-19 Virus Outbreak has increased, the Abnormal Return value will increase.

scholarly journals Effect of Policy Reforms on Market Efficiency: Evidence from Dhaka Stock Exchange

2011 ◽  
Vol 2011 ◽  
pp. 1-8 ◽  
Author(s):  
Md. Mahmudul Alam ◽  
Shakila Yasmin ◽  
Mahmudur Rahman ◽  
Md. Gazi Salah Uddin
Keyword(s):  
Market Efficiency ◽  
Subject Matter ◽  
Stock Exchange ◽  
Weak Form ◽  
Nonparametric Test ◽  
Policy Reforms ◽  
Parametric Test ◽  
Normality Test ◽  
Run Test ◽  
The Impact

The paper tries to find evidence supporting the impact of continuous policy reforms on the market efficiency on the Dhaka Stock Exchange (DSE). Different policies formed/reformed from 1994 to 2005 were categorized in eleven groups depending on their time of issue and subject matter. To get the result, both nonparametric test (Kolmogrov-Smirnov normality test and run test) and parametric test (autocorrelation test, autoregression) have been performed. Analyses were done for each policy group, and it is found that formed/reformed policies for DSE during the study period failed to improve the market efficiency even in the weak form level.

scholarly journals Study the random walking of the ISX60 market index For the Iraq Stock Exchange

2019 ◽  
Vol 14 (46) ◽  
pp. 109-118
Author(s):  
Sadik Jafar Al-Attabi ◽  
Siham Jabbar Mezher ◽  
Siham Jabbar Mezher ◽  
Salim Sallal AL-Hisnawi
Keyword(s):  
Market Efficiency ◽  
Serial Correlation ◽  
Stock Exchange ◽  
Ratio Test ◽  
Variance Ratio ◽  
Random Walking ◽  
Correlation Test ◽  
Market Index ◽  
Rescaled Range ◽  
Variance Ratio Test

This paper aimed to test random walking through the ISX60 market index for the ability to judge market efficiency at a weak level. The study used Serial Correlation Test, the Runs Test, the Variance Ratio Test, as well as the Rescaled Range Test.The population of the study represents of Iraq Stock Exchange. The study concluded accepting the hypothesis of the study that the returns of the ISX60 market index in the Iraqi market for securities does not follow the random walking in general and as a result the Iraq market for securities is inefficient within the weak level of efficiency and the study recommended need a supervisors work in the Iraqi market for securities to activate all means a which will work to communication with information to all investors and thus raise the efficiency of the Iraqi market for securities in order to the avoid of achieving unusual returns by some investors.

scholarly journals ANALISIS EFISIENSI PASAR MODAL KONVENSIONAL BENTUK LEMAH DI BURSA EFEK INDONESIA PERIODE 2014-2015

2020 ◽  
Vol 7 (2) ◽  
pp. 101
Author(s):  
Ade Lisa Istifarida ◽  
Salamatun Asakdiyah
Keyword(s):  
Data Collection ◽  
Market Efficiency ◽  
Capital Market ◽  
Stock Price ◽  
Sampling Technique ◽  
Weak Form ◽  
Price Information ◽  
Purposive Sampling ◽  
Sample Testing ◽  
Run Test

The purpose of this study is to determine efficiency in a weak form conventional capital market in Indonesia using stock price data weekly in the 2014-2015 period. Techniques in testing market efficiency forms. This weakness uses a purposive sampling technique as well as a method for data collection using the documentation method. Obtained 36 companies which is included in the LQ-45 index which is used as a research sample. Testing the hypothesis of a weak form of capital market efficiency using the run test test. The results of this study, that the conventional capital market is efficient in a weak form using stock price information for the period research. It is proven by 33 shares (91.7%) moving randomly (random) and 3 shares (8.3%) move non-randomly (not randomly). Then it can be concluded that the conventional capital market is efficient in its form weak.

scholarly journals Effect of Policy Reforms on Market Efficiency: Evidence from Dhaka Stock Exchange (DSE)

2019 ◽  
Author(s):  
Md. Mahmudul Alam ◽  
Shakila Yasmin ◽  
Mahmudur Rahman ◽  
Gazi Salah Uddin
Keyword(s):  
Market Efficiency ◽  
Stock Exchange ◽  
Weak Form ◽  
Policy Reforms ◽  
Parametric Test ◽  
Normality Test ◽  
Auto Correlation ◽  
Run Test ◽  
The Impact ◽  
Auto Regression

The paper tries to find evidence supporting the impact of continuous policy reforms on the market efficiency on the Dhaka Stock Exchange (DSE). Different policies formed/reformed from 1994 to 2005 were categorized in eleven groups depending on their time of issue and subject matter. To get the result, both non-parametric test (Kolmogrov-Smirnov normality test and Run test) and parametric test (Auto-correlation test, Auto-regression) has been performed. Analyses were done for each policy group, and it is found that formed/reformed policies for DSE during the study period failed to improve the market efficiency even in the weak form level

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