企业声誉与媒体权威性在证券市场传闻澄清中的作用——关于上市公司应对证券市场传闻的实证研究

发布澄清公告是上市公司应对市场传闻的主要途径。然而,在中国证券市场中,澄清公告却澄而不清,其原因在于某些因素会影响澄清公告的有效性。文章主要围绕信息内容（否认措辞）和信息来源（澄清企业的声誉与传闻媒体的权威性）两类影响因素进行探讨。研究发现,否认措辞将对澄清效果产生影响,并且两者的关系同时受到企业声誉和媒体权威性的调节作用,企业声誉越差,媒体权威性越高,否认措辞对澄清效果的影响越大。研究结论检验了心理学理论在证券市场中的有效性,拓展了金融市场领域的研究范畴,同时为上市公司应对市场传闻提供了新的思路。      

投资者对市场传闻反应的影响因素分析——传闻准确性与媒体权威性的作用

金融市场中的各类传闻具有不同的特征。然而,传闻特征对投资者的作用尚未得到金融领域的实证检验。对中国A股市场中负面传闻的准确性和传闻媒体的权威性两大特征的研究发现,传闻准确性会对投资者的交易行为产生影响,传闻越准确,投资者反应越强烈。然而,此结论仅对权威媒体发布的传闻有效,原因在于投资者能够通过权威媒体正确预测传闻的准确性,而无法通过非权威媒体进行预测。     

The diffusion of innovation theory and the effects of IFRS adoption by multinational corporations on capital market performance: a cross-countryanalysis

This article seeks to contribute to International Financial Reporting Standards (IFRS) literature by examining the effects of adopting IFRS on stock market performance worldwide from the diffusion of innovation theory perspective. Our study revealed several interesting findings after using combinations of unique panel data sets from 110 countries worldwide and conducting a robust empirical analysis from 1995 to 2014. First, we found a positive association between late mandatory IFRS adoption and stock market integration in Europe. Second, our findings indicate a significant negative association between early IFRS adoption and the following financial indicators: stock market trading volumes, stock market capitalization, market turnover, and market return. Third, our study reveals an insignificant association between early IFRS adoption and stock price volatility alongside stock market development. Our findings are robust and have significant practical and policy implications for regulators and policymakers of multinational corporations.     

How Have the Emerging Stock Exchanges in Africa Responded to Market Reforms?

Abstract

In this paper, we focus on how the stock markets in Africa have responded to the reform process. We identify three main types of reforms implemented in these markets since the 1990s, namely revitalization of the regulatory framework, modernization of trading systems, and relaxation of restrictions on foreign investors. We invoke market microstructure theory to hypothesize the expected response of the markets in terms of efficiency and volatility to the three types of reforms. Econometric methods are applied to test the hypotheses on a sample of ten stock exchanges, for the period 1988:01-1999:12. The evidence generally suggests that there are benefits of investments to improve market microstructure. For example, a comparative analysis across the sample demonstrates that markets with advanced trading technology, tight regulatory system and relaxed foreign investors' participation show greater efficiency and lower market volatility. Although direction of causality between efficiency and volatility varies across the markets, in general, we infer that reforms, which reduce volatility, reap higher efficiency. However, in some markets, the effects of the reforms are too recent to show any clear response pattern.     

Weak-Form Market Efficiency of the Nigerian Stock Market in the Context of Financial Reforms and Global Financial Crises

The weak-form efficient market hypothesis for the Nigerian Stock Market (NSM) is explored using different statistical tests. The analyses use overall stock market returns collected over the period 2000–2010. It is shown that the NSM is not weak-form efficient which questions the benefits of the 2004 financial reforms. It is also shown that the degree of market inefficiency varies across the periods corresponding to the financial reforms and 2007 global financial crisis, for daily and monthly returns. The results are important to security analysts, investors, and security exchange regulatory agencies in their investment, stock market development, and policy-making decisions.     

Islamic legal methodologies and Shariah screening standards: Application in the Indonesian stock market

This article provides a framework for applying the principles of Islamic legal methodology to determine the optimal Shariah screening standards for Islamic equity markets. It is argued that using maslahah mursalah (unrestricted benefit) is an appropriate method for identifying appropriate financial standards and its principles stipulate that the benchmark that yields the best economic returns to investors should be chosen. The methodological framework is applied to the Indonesia equity market where the economic implications of the Islamic stock screening standards of the Indonesian Islamic Shariah Stock Index and four global indices are assessed. Portfolios are constructed by applying Islamic stock screening standards for each of the indices by using data on 377 stocks listed in the Indonesian stock market for 5 years. The performances measured by the Sharpe ratio, Treynor index, and Jensen alpha reveal that the Dow Jones Islamic Index screening criteria performs the best. Based on the method of maslahah mursalah, the article recommends using the screening standard of this index in the Indonesian stock market to maximize benefits to investors. While the approach used in this article is applied to Islamic equity markets, the methodological framework can also be used for other similar cases in Islamic finance.     

Stock Market Development and Long-Run Growth in Nigeria

Abstract

The study empirically assessed the relationship between stock market development and long-run economic growth in Nigeria for the period 1980 to 2000. The study used secondary data while four models of multiple regressions were specified. The regression results, which were obtained using the Ordinary Least Square (OLS), show that measures of stock market development statistically have no significant effect on economic growth in Nigeria during the period 1980 to 2000. The major implication of the findings is that if the Nigerian Stock Market is to significantly contribute to rapid economic growth, policies must be fashioned out to eliminate those factors that blur the effectiveness of the vehicle or transmission mechanism through which stock market activities influence economic growth.

Based on the findings, it was recommended that there should be an improvement in the attractiveness of the market as a major source of raising capital. This will entail improvement in the physical infrastructure, more efficient share transfer and delivering system and provision of adequate and timely information on the market. Also, there should be improvement in the institutional regulation, environment and legal framework such that a balance is maintained between the soundness and safety of the market. And finally, there is the need to internationalize the stock market to improve the flow of savings. This willgive the market the advantages of risk diversification, improve information flow and encourage corporate control through investment in equity.     

The impact of reporting frequency on the information quality of share price: evidence from Chinese state-owned enterprises

As a major global exchange, the Stock Exchange of Hong Kong (SEHK) only requires semi-annual reporting whereas other major exchanges including the ones in Chinese mainland require quarterly reporting. We argue against the traditional view that higher reporting frequency is necessarily more beneficial. The decision on reporting frequency depends on how the information is being processed by the recipient traders and the results are not obvious. Using a sample of Chinese companies duallisted in both China A share market and SEHK (AH shares) as the experimental group and mainland’s companies listed on SEHK (H shares) only as the control group, we apply the difference-in-difference (DID) method to investigate the impacts of reporting frequency on stock information quality. The results suggest that after China A share market require quarterly financial reporting for all listed companies in 2002, the information asymmetry of the H tranche of AH stocks increases. Different from prior studies, the results suggest a negative association between stock information quality and financial reporting frequency. We argue that the increased information asymmetry in the H tranche is caused by the noise spilled over from the A tranche. We conduct multivariable GARCH tests and find evidence supporting this conjecture.     

Foreign investors in Taiwan: Their roles and government perspectives

This article describes the financial liberalization process in Taiwan and evaluates the effects of foreign institutional investors on Taiwan's stock market. Gradual liberalization allowed Taiwan to reap the benefits while reducing the harmful impacts of foreign participation during the Asian financial crisis. Overall, the liberalization policies proved to be effective as the stock market has become more stable and efficient. Foreign institutional investors contribute significant growth to the Taiwan stock market, and will continue to play a sizeable role in its future development.     

多元化速度与企业风险短期关联研究——基于中国制造业上市公司数据的研究

企业多元化是个持续过程,度量企业多元化还须使用动态维度,多元化速度可以作为度量企业多元化的动态指标。基于沪深两市制造业上市公司的数据资料,构建多元回归模型,考察多元化速度对企业市场风险、财务风险、经营风险以及总风险的影响,得出以下结论:短期内,较快的多元化速度能降低企业市场风险、财务风险和经营风险;当经济总体处于快速发展阶段,企业应重视多元化速度所产生的正面影响,不失时机加快多元化速度,促进企业成长。     

Market inefficiencies surrounding energy announcements

We use sequential energy inventory announcements to shed new light on the informational efficiency of financial markets. Our findings provide clear evidence of inefficiency in crude oil futures and stock markets. This inefficiency can be exploited by sophisticated traders. We examine the effect of market liquidity on the efficient incorporation of information in this setting. We also construct a predictor that can predict inventory surprises and preannouncement returns in-sample and out-of-sample. Finally, we develop a combination forecast that can be used as a proxy for market expectations of oil inventory announcements.     

借鉴美国经验规范和发展我国货币市场基金

美国货币市场发达的主要原因在于可供交易的货币市场工具丰富,结构层次化、利率市场化,参与广泛等。我国货币市场规模小、品种单一,市场基础设施不完善,缺少相应的组织结构和制度保障,与美国货币市场化相去甚远。应借鉴美国的经验发展我国货币市场基金,加强货币市场基础设施建设,创新金融产品,加强货币市场基金风险管理,真正发挥货币市场基金作为现金管理工具的功能。     

What factors explain stock market retardation in Islamic Countries

Stock markets have been recognized in literature as a source of financial development and economic growth. Notwithstanding the recent trend of the stock market development in emerging countries, some argue that Islamic countries' stock exchanges are still infantile. The central aim of this research, therefore, is to investigate factors impeding stock market development (SMD) in Islamic countries. We explore a panel annual data of 11 main Islamic countries vis-à-vis the developed countries for the period of 1996–2011. The findings show that all of our concerned macroeconomic determinants play a major role in the developed countries. On the other hand, financial openness has substantially less contribution in Islamic countries, while the financial intermediary development plays a major role. The results are also indicative of the need for the Islamic countries to improve their legal environment and economic freedom. Lastly, we also attempt to measure the integration level, where the findings tend to indicate a relatively lower and unstable pattern of integration for the Islamic countries, suggesting the impact of volatile inflows.     

Testing the Martingale Difference Hypothesis (MDH) with Structural Breaks: Evidence from Foreign Exchanges of Nigeria and South Africa

ABSTRACT

This study tests for MDH in two prominent foreign exchange (FX) markets in Africa, Nigeria and South Africa using three benchmark currencies (euro, dollar and pound sterling). Data utilized cover time series closing rate data set of five-day weekly frequency spanning December 14, 2001 to September 26, 2014. The study considers both the linear and nonlinear measures for MDH with better size and power properties. We also capture structural break endogenously from the data stream using Perron (2006) unit root test with structural break. Three striking findings are discernible from our analyses. First, on average, the South African FX market appears to be more efficient than the Nigerian FX market. Thus, the latter may be more susceptible to speculations than the former. Second, ignoring significant structural breaks may render statistical inferences invalid. Third, the choice of methodology does matter when testing for MDH of foreign exchanges in Africa.     

The sublime and consumer behavior: Consumption as defense against the infinite

The latest financial crisis has aroused public discussion about the moral aspects of financial speculation and the rights and responsibilities of different market actors, including private consumers of financial products. Shifting the focus away from the level of individual morals and choices, this paper sets out to trace the discursive “conditions of possibility” for reflective and responsible financial consumption. Through a critical discourse analysis of media and marketing texts, the paper identifies and examines four conventionalized discourses of stock market investing: market mechanics, market psychology, market participation, and market expertise. The paper shows how each of these widely normalized discourses articulates investing as an individual enterprise of wealth management, devoid of broader social or political relevance. It is argued that the prevalence of such representations is likely to discourage social awareness with regard to financial consumption and to impede the establishment of fair and sustainable market practices.     

Emerging Securities Exchanges in Africa

ABSTRACT

African securities markets have not received the academic attention of those in Latin America and Southeast Asia. Historically, capital markets have not played a significant role in financing the development of the African economy. Today, however, African governments are focusing on the importance of moving toward more market-oriented economies and developing the financial market infrastructure to mobilize funds from both the private and public sectors. This paper describes the institutional characteristics of a newly revitalized stock exchange in Nairobi, Kenya. The study concludes that historical and cultural factors play a significant role in the characteristics of the Nairobi Stock Exchange.     

对股票市场效率问题的四种理论分析方法

股票市场效率问题研究是金融经济学中的一个热点课题 ,很多学者对此进行了深入的研究。解释股市效率问题主要有 :有效率市场假说理论、微观信息经济学理论、行为金融学理论、以及股市内在效率和外在效率分析等四种理论分析方法。     

Stock market,credit market,and heterogeneous innovations

The relative importance of credit market development and stock market development in boosting innovation remains a long-standing debate issue. In this study, we document how different types of financial markets development affect heterogeneous innovations. Using a broad sample across 42 developed and emerging economies and a generalized difference-in-differences identification strategy, we find that stock market development leads to significantly higher substantive innovation, especially in young and small firms, but has negative impact on incremental innovation. Conversely, credit market development promotes incremental innovation, especially in mature and large firms, but has negative impact on substantive innovation. Further analyses indicate that stronger shareholder protection enhances the positive impact of stock market on substantive innovation, while stronger creditor rights enhance the promoting effect of credit market on incremental innovation, and even turn the negative impact of credit market on substantive innovation into positive. Our paper provides new insights into the heterogeneous effects of credit market and equity markets on the real economy.     

A model for unpacking big data analytics in high-frequency trading

This study develops a conceptual model of the 7 V′s of big data analytics to gain a deeper understanding of the strategies and practices of high-frequency trading (HFT) in financial markets. HFT is computerized trading using proprietary algorithms. Empirical data collected from HFT firms and regulators in the US and UK reveals competitive asymmetries between HFTs and low-frequency traders (LFTs) operating more traditional forms of market trading. These findings show that HFT gains extensive market advantages over LFT due to significant investment in advanced technological architecture. Regulators are challenged to keep pace with HFT as different priorities to the 7 V′s are given in pursuit of a short term market strategy. This research has implications for regulators, financial practitioners and investors as the technological arms race is fundamentally changing the nature of global financial markets.     

A secure,real-time stock market protocol

Stock markets constitute the largest electronic commerce market in the world. The tremendous growth in trading volume and the need for fast and accurate transaction execution has made the stock market one of the most technology friendly markets. The fastest growing stock exchange, NASDAQ, is a wholly electronic stock exchange with all transactions conducted over computer networks. However, the transaction model used by NASDAQ and other electronic stock markets still borrows heavily from the older traditional models used by non-electronic stock exchanges. Two important requirements of modern day stock market transactions are: (a) customer's ability to place sophisticated transaction orders to buy/sell stock, and (b) customer's ability to detect transaction delays. Modern electronic stock exchanges lack both the ability to place newer, more sophisticated transaction orders and the ability to detect delays in transaction execution. In this paper, we propose a protocol for stock market transaction that can model a new sophisticated model for transaction orders while continuing to support traditional transaction orders. The protocol is augmented with a mechanism to detect delays in transaction execution. It is further shown that the protocol proposed is secure, atomic, anonymous, private, and incurs low overhead costs. This revised version was published online in June 2006 with corrections to the Cover Date.