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Testing the weak form of efficient market hypothesis for socially responsible and Shariah indexes in the USA
Journal of Islamic Accounting and Business Research Pub Date : 2021-07-12 , DOI: 10.1108/jiabr-02-2020-0055
Abbas Khan 1 , Muhammad Yar Khan 1 , Abdul Qayyum Khan 1 , Majid Jamal Khan 1 , Zia Ur Rahman 2
Affiliation  

Purpose

By testing the weak form of efficient market hypothesis (EMH) this study aims to forecast the short-term stock prices of the US Dow and Jones environmental socially responsible index (SRI) and Shariah compliance index (SCI).

Design/methodology/approach

This study checks the validity of the weak form of EMH for both SCI and SRI prices by using different parametric and non-parametric tests, i.e. augmented Dickey-Fuller test, Philip-Perron test, runs test and variance ratio test. If the EMH is invalid, the research further forecasts short-term stock prices by applying autoregressive integrated moving average (ARIMA) model using daily price data from 2010 to 2018.

Findings

The research confirms that a weak form of EMH is not valid in the US SRI and SCI. The historical data can predict short-term future price movements by using technical ARIMA model.

Research limitations/implications

This study provides better guidance to risk-averse national and international investors to earn higher returns in the US SRI and SCI. This study can be extended to test the EMH of Islamic equity in the Middle East and North Africa region and other top Islamic indexes in the world.

Originality/value

This study is a new addition to the existing literature of equity investment and price forecasting by comparing and investigating the market efficiency of two interrelated US SRI and SCI.



中文翻译:

测试美国社会责任指数和伊斯兰教法指数的有效市场假设的弱形式

目的

通过测试有效市场假设 (EMH) 的弱形式,本研究旨在预测美国道琼斯环境社会责任指数 (SRI) 和伊斯兰教法合规指数 (SCI) 的短期股价。

设计/方法/方法

本研究通过使用不同的参数和非参数检验,即增强 Dickey-Fuller 检验、Philip-Perron 检验、运行检验和方差比检验,检验弱形式的 EMH 对 SCI 和 SRI 价格的有效性。如果 EMH 无效,本研究利用 2010 年至 2018 年的每日价格数据,通过应用自回归综合移动平均 (ARIMA) 模型进一步预测短期股价。

发现

研究证实,弱形式的 EMH 在美国 SRI 和 SCI 中无效。历史数据可以通过使用技术 ARIMA 模型来预测短期的未来价格走势。

研究限制/影响

这项研究为规避风险的国内外投资者提供了更好的指导,以在美国 SRI 和 SCI 中获得更高的回报。本研究可以扩展到测试中东和北非地区伊斯兰股票的 EMH 以及世界其他顶级伊斯兰指数。

原创性/价值

本研究通过比较和调查两个相互关联的美国 SRI 和 SCI 的市场效率,对现有的股权投资和价格预测文献进行了补充。

更新日期:2021-08-05
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