scholarly journals KETERBUKAAN INFORMASI UU PASAR MODAL MENCIPTAKAN ASYMMETRIC INFORMATION DAN SEMI STRONG FORM

2021 ◽  
Vol 50 (1) ◽  
pp. 106-118
Author(s):  
Suwinto Johan ◽  
Ariawan Ariawan
Keyword(s):  
Asymmetric Information ◽  
Efficient Market Hypothesis ◽  
Strong Form ◽  
Efficient Market

Sebuah pasar modal digolongkan sebagai pasar yang efisien atau akurat jika informasi yang ada di bursa tersebut terbuka dan diketahui oleh semua pelaku secara merata. Undang Undang No. 8 Tahun 1995 mewajibkan keterbukaan informasi material dengan jangka waktu maksimal 2 hari kerja setelah adanya informasi yang material. Penelitian ini bertujuan untuk meneliti keterkaitan antara kewajiban keterbukaan informasi material dengan mewujudkan pasar modal yang efisien berdasarkan Efficient Market Hypothesis. Penelitian ini menggunakan metode yuridis normatif. Penelitian ini menemukan bahwa kewajiban pelaporan maksimal 2 hari kerja akan mengakibatkan keterlambatan informasi bagi pelaku pasar modal. Pasar modal yang tidak efisien tidak akan membuat pengembalian yang optimal. Pengaturan mengenai pelaporan informasi yang material perlu dirubah.

scholarly journals Evidence for and Against the Validity of Efficient Market Hypothesis

2018 ◽  
Vol 56 (3) ◽  
pp. 369-387
Author(s):  
Miljan Leković
Keyword(s):  
Market Efficiency ◽  
Financial Market ◽  
Efficient Market Hypothesis ◽  
Strong Form ◽  
Efficient Market ◽  
Market Anomalies ◽  
Development Path

Abstract The concept of an efficient financial market, in literature known as efficient market hypothesis (EMH), has had a long and difficult development path from the idea itself to its final conception, as one of the central paradigms in modern finance. It has been tested and critically reviewed for decades, and the two basic types of problems it has encountered are theoretical paradoxes and market anomalies. The aim of the paper is to examine the validity of EMH through various financial market efficiency tests and the results of previous research. The intention is to answer the question of whether, despite theoretical paradoxes and market anomalies, the notion of validity can be attributed to the concept of an efficient financial market. In this regard, the paper presents plenty of evidence for and against the validity of weak, semi-strong, and strong form of EMH, to conclude that, even after more than half a century of research, financial literature has not reached a consensus on the presence or absence of the validity of this hypothesis.

scholarly journals An approach of spectrum analysis to the stock prediction

2020 ◽  
Author(s):  
James L. Luo
Keyword(s):  
Game Theory ◽  
Asymmetric Information ◽  
Capital Markets ◽  
Spectrum Analysis ◽  
Efficient Market Hypothesis ◽  
Human Action ◽  
Efficient Market ◽  
New Approach ◽  
Validity Test ◽  
Lot Sizes

This article constructs a brand new approach to the prediction of capital markets in the perspective of Volume Spectrum Analysis (VSA). Unlike all traditional financial theories, the model of VSA features volume rather than price and focuses on its inner structure, i.e. the distribution of lot sizes that reveals asymmetric information in trading, which rejects the assumption of perfect information in Efficient Market Hypothesis (EMH) and makes the validity test possible. The flaw of modern finance, that is, taking the normality of price changes for granted, and those of other solutions such as game theory, are investigated to show why it is only VSA that may capture the essence of human action in capital markets.

scholarly journals Entry, exit, ownership structure and the efficient market hypothesis: a case study of the Kuala Lumpur stock exchange

2008 ◽  
Vol 5 (4) ◽  
pp. 315-325
Author(s):  
Vglingam Sivalingam
Keyword(s):  
Stock Exchange ◽  
Theoretical Perspective ◽  
Complete Information ◽  
Weak Form ◽  
Efficient Market Hypothesis ◽  
Strong Form ◽  
Barriers To Entry ◽  
Kuala Lumpur ◽  
Efficient Market ◽  
Competitive Model

The objective of this paper is to provide a new theoretical perspective on testing the Efficient Market Hypothesis in the Kuala Lumpur Stock Exchange (KLSE). Previous studies have shown that the KLSE is weak form efficient or at most semi strong form efficient. However, an adequate explanation has not been provided as to why the KLSE is not strong form efficient. The paper suggests that this is because the KLSE does not approximate the neoclassical competitive model in terms of entry, pricing and exit. There are barriers to entry and exit and hence to the free flow of accurate and complete information in the KLSE. The securities offered for sale are also underpriced as there is extensive government intervention to ensure adequate returns to investors. The market is also dominated by large government owned and family owned conglomerates. This together with a segmented market for three classes of investors, that is, the bumiputras, the other Malaysians and foreigners ensures that resources are not allowed to flow to their most value users and hence prices are not competitively set. The paper ends by noting that the KLSE is moving from a government dominated exchange for securities to a market system as a result of recent reforms and policy changes

scholarly journals Stock market under the 2016 Brazilian presidential impeachment: a test in the semi-strong form of the efficient market hypothesis,

2018 ◽  
Vol 29 (78) ◽  
pp. 405-417
Author(s):  
Alexandre Ricardo de Aragão Batista ◽  
Uxi Maia ◽  
Alécio Romero
Keyword(s):  
Stock Market ◽  
Moving Average ◽  
Abnormal Returns ◽  
Efficient Market Hypothesis ◽  
Strong Form ◽  
Autoregressive Moving Average ◽  
Specific Situation ◽  
Efficient Market ◽  
Time Series Regression ◽  
Cumulative Abnormal Returns

ABSTRACT This article aims at contributing to study the stock market’s reaction up to the point of generating significant abnormal returns or cumulative abnormal returns within the Brazilian impeachment period. By means of the efficient market hypothesis (EMH), in its semi-strong form, the purpose was verifying whether the presidential impeachment that took place in Brazil in 2016, in 3 different dates, brought the expected reaction from the stock market on the Brazilian Stocks, Commodities and Futures Exchange (BM&FBOVESPA). The theme is relevant, as it addresses aspects of politics and economic theory and their interactions in stock markets. It impacts in the area of capital markets, because this suggests that economic players can, through their expectations and information, see adverse reactions in the market. The methodology analytically employed encompasses a brief literature review as a theoretical basis about the institutions involved and it refers historically to impeachment events. Quantitatively, the methodology consists in the study of events, so that the expectations are observed by means of time-series regression models based on the autoregressive-moving-average (ARMA) models. The result found, under three major events that culminated in the 2016 Brazilian presidential impeachment, was that no significant statistics has been determined, at a 5% level, in all estimated windows and in all events. Statistically, it was not possible to reject the hypothesis that the abnormal returns and the cumulative abnormal returns equal zero. So, the markets have been considered to be well-informed regarding the events, in this specific situation, i.e. according to the EMH, in its semi-strong form, the markets have reacted as expected.

scholarly journals SEMI-STRONG FORM EFFICIENCY OF NIFTY 50 INDEX: AN EMPIRICAL TESTING IN RELATION TO RIGHTS ISSUE ANNOUNCEMENTS

2019 ◽  
pp. 192-196
Author(s):  
Mr.Ch Naveen ◽  
Prof. G. Satyanarayana
Keyword(s):  
Event Study ◽  
Stock Price ◽  
Weak Form ◽  
Efficient Market Hypothesis ◽  
Strong Form ◽  
Stock Index ◽  
Efficient Market ◽  
Price Series ◽  
Study Methodology ◽  
Rights Issue

Stock price series is a wandering one. Investors put their money after analysing the behavior of the price using technical or fundamental analysis. The assumption behind these models is that the stock price behaviour is quite orderly and not random. Many researchers questioned this assumption and argued that the stock price behaviour is random. Efficient market hypothesis is explained in three levels. Weak form, semi-strong forma and strong form. With this background an attempt was made to anlayse the efficiency of the leading stock index in India i.e. Nifty 50 Index in weak-form in relation to rights issue. In this study rights issue of Nifty 50 companies announced during 2009-2018 were considered and event study methodology was applied to examine the randomness. The results of the study revealed that the Nifty 50 Index is not efficient in semi-strong form. KEY WORDS: Efficient Market hypothesis, Rights issue, event study, Nifty 50 index.

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