Malliavin's Calculus in Insider Models: Additional Utility and Free Lunches

We consider simple models of financial markets with regular traders and insiders possessing some extra information hidden in a random variable that is accessible to the regular trader only at the end of the trading interval. The problems we focus on are the calculation of the additional utility of the insider and a study of his free lunch possibilities. The information drift—that is, the drift to eliminate in order to preserve the martingale property in the insider's filtration—turns out to be the crucial quantity needed to answer these questions. It is most elegantly described by the logarithmic Malliavin trace of the conditional laws of the insider information with respect to the filtration of the regular trader. Several examples are given to illustrate additional utility and free lunch possibilities. In particular, if the insider has advance knowledge of the maximal stock price process, given by a regular diffusion, arbitrage opportunities exist.     

International Linkages among Stock Markets of Malaysia and Its Major Trading Partners

This study empirically examines the short- and long-run dynamic causal linkages between Malaysia and its major trading partners (the United States, Japan, Singapore, China, and Thailand) based on a two-step estimation, Autoregressive distributed lag (ARDL) and Generalized Method of Moments (GMM) during the period 1992–2008. The study documents that the stronger the trade ties among the countries, the higher the degree of comovements among their stock markets. The Japanese stock market, to some extent, is found to be more important than the United States over these markets. In designing stock market policies, each country should take into consideration of any shocks in its major trading partners.     

Corporate Disclosures: Strategic Donation of Information*

In this paper, we model a corporate insider's motivation of truthful pre‐trade disclosure of her private payoff‐relevant information. In a model in which disclosure has no efficiency gains like reduced cost of capital, no legal implications, and no signaling motivations, we show that a corporate insider may choose to disclose payoff‐relevant information as a means of maximizing her trading profits. This truthful disclosure is done pre‐trade and is beneficial to the corporate insider as it erodes the informational advantage of other traders with private information. This new rationale for public disclosure needs to be empirically tested by examining the trades of corporate insiders after, and not before, public disclosures.     

The Issue of Insider Trading in Law and Economics: Lessons for Emerging Financial Markets in the World

Growth of the private sector and privatization of state companies around the world have led to the emergence of various stock markets, some of which are depicted by insider trading. Law literature uses the arguments of unfairness, breach of fiduciary rights and damage to others to define and rule against insider trading. Economic literature can be used to interpret insider trading from other perspectives. This study argues that the question of insider trading in developing markets can be resolved by the extent stock markets generate externalities and are public goods. It advocates structural changes in the developing markets and examines the conditions under which the Coase Theorem would work.     

Ethical Reasoning and the Use of Insider Information in Stock Trading

The cognitive developmental theory of ethics suggests that there is a positive relationship between ethical reasoning and ethical behavior. In this study, we trained a sample of accounting and finance students in performing competitive stock trading in our state-of-the-art trading room. The subjects then performed trading of stocks under two experimental conditions: insider information, and no-insider information where significant performance-based financial awards were at stake. We also administered the Defining Issues Test (DIT). Ethical behavior, as the dependent variable was measured in a binary scale: whether the subjects used insider information for trading of stocks or not. Ethical reasoning as measured by the DIT P-score indicated statistically significant effect on ethical behavior. The results have important implications for recruitment and training of professionals engaged in the use of financial markets for securities trading.     

Trade Misinvoicing: The Dark Side of World Trade

We analyse the determinants of trade misinvoicing using data on 86 countries from 1980 to 2005. In a simple microeconomic framework, we derive the determinants of four different types of trade misinvoicing taking into account that only the financial incentives determine whether and how much exports/imports to underinvoice or overinvoice, whereas the deterrents only affect the extent of misinvoicing. The hypothesised determinants are tested using data on discrepancies in bilateral trade with the United States. We find that the black market premia and tariffs motivate illegal trading activities. Higher financial penalties effectively act as a deterrent to this crime.     

Half-day trading and spillovers

This paper investigates the linkage of returns and volatilities between the United States and Chinese stock markets from January 2010 to March 2020. We use the dynamic conditional correlation (DCC) and asymmetric Baba–Engle–Kraft–Kroner (BEKK) GARCH models to calculate the time-varying correlations of these two markets and examine the return and volatility spillover effects between these two markets. The empirical results show that there are only unidirectional return spillovers from the U.S. stock market to the Chinese stock market. The U.S. stock market has a consistently positive spillover to China’s next day’s morning trading, but its impact on China’s next day’s afternoon trading appears to be insignificant. This finding implies that information in the U.S. stock market impacts the performance of the Chinese stock market differently in distinct semi-day trading. Moreover, with respect to the volatility, there are significant bidirectional spillover effects between these two markets.     

UTILITY MAXIMIZATION IN AN INSIDER INFLUENCED MARKET

We study a controlled stochastic system whose state is described by a stochastic differential equation with anticipating coefficients. This setting is used to model markets where insiders have some influence on the dynamics of prices. We give a characterization theorem for the optimal logarithmic portfolio of an investor with a different information flow from that of the insider. We provide explicit results in the partial information case that we extend in order to incorporate the enlargement of filtration techniques for markets with insiders. Finally, we consider a market with an insider who influences the drift of the underlying price asset process. This example gives a situation where it makes a difference for a small agent to acknowledge the existence of an insider in the market.     

我国证券市场监管存在的问题及对策探析

证券市场的健康发展离不开对其有效的监管。当前,我国证券市场还处于发展初期,存在着监管法规不够健全,监管体制不完善,信息披露制度不规范等问题,使得内幕信息提前泄露,信息披露不充分,某些机构操纵股价的现象时有发生,中小投资者面临着很大的风险。我国应建立健全对证券市场监管的相关法律法规,进一步完善证券市场监管体制,进一步健全证券市场的信息披露制度,努力改善交易信息失灵状况,从而促进我国证券市场健康发展。     

Insider trading laws and price informativeness in emerging stock markets: The South African case

We test the view that insider trading deters informativeness and, thereby, provide empirical evidence on the ramifications of insider trading legislation, particularly in an emerging market, that has hitherto received no research attention. Using the difference-in-differences identification strategy, we find that “effective insider trading law” improves stock price informativeness, a reflection of market efficiency, and that this efficiency is robust to both economic factors that affect market efficiency and the choice of control. Importantly, our results support the hypothesis that prohibition of insider trading elicits efficiency enhancement, particularly in emerging markets which are often characterized by weaker requisite institutional infrastructure than developed markets.     

An Interim Assessment of the US Trade Policy of ‘Competitive Liberalization’

Since 2001, the Administration of George W. Bush has pursued a trade policy known as Competitive Liberalization. This policy envisages a series of mutually‐reinforcing and sequential steps to open markets abroad to US companies, to strengthen market‐oriented laws and regulations overseas, and to place the United States at the centre of the world trading system. Foreign and security policy considerations have influenced US trade policy making, perhaps more so than in the 1990s. To date the principal outcome of this policy has been the negotiation by the United States of numerous free trade agreements, mainly with developing countries, individually or in sub‐regional groupings. In addition to characterising this policy in detail, the principal purpose of this paper is to assess the logic underlying this approach to trade policy making and whether Competitive Liberalization has begun to fulfil the promise spelled out for it at the beginning of this decade.     

上市公司信息泄露减少了吗?——基于《上市公司信息披露管理办法》实施前后的比较

运用事件研究法对《上市公司信息披露管理办法》实施前后两年,即2005—2009年深沪两市A股业绩预告利多、高送转和增发三类重大事件信息披露的市场反应进行实证分析,利用内幕交易和信息泄露程度测度上市公司信息披露的公平性,检验了《上市公司信息披露管理办法》的实施效果。结果显示,信息公平披露规则在实施当年的短期内发挥了作用,但总体效果并不明显,信息泄露程度呈先下降后回升的趋势,内幕交易依然存在。为此,应进一步加强信息披露的监管,加大对违规信息披露的处罚力度;在强调公平信息披露的同时,关注上市公司信息披露的及时性;正确处理好资本市场效率与信息披露公平两者之间的关系。     

Failure of the WTO Ministerial Conference at Cancun: Reasons and Remedies

This paper first discusses four general developments in the world trading system that have made it increasingly difficult in recent years for nations to reach multilateral agreements aimed at further liberalising international trade, namely: (1) the increased technical complexity and disruptive domestic economic effects of the issues being negotiated; (2) the shift in relative bargaining power among the negotiating participants in favour of the developing countries; (3) the proliferation of bilateral and regional free trade agreements in contrast to multilateral agreements, and (4) the increased emphasis on achieving ‘fairness’ rather than reciprocity in trade liberalisation. Differences in negotiating positions of the participants on the major specific negotiating subjects of the Doha Round, such as new rules covering investment, competition policy, government procurement policy, and trade facilitation, agricultural liberalisation, changes in anti‐dumping and countervailing duty rules, the tariff‐cutting rule to increase access to non‐agricultural markets, and further liberalisation in the services sector, are then considered as well as the likelihood of reaching compromises on these matters. Finally, the possibilities of reaching acceptable balances of concessions and gains are considered for such key participants as the Group of 20 developing countries, the European Union, the United States and other industrial countries.     

The market response of insider transferring trades and firm characteristics in Taiwan

This paper reports the announcement effects of insider transfer trades and relates these with firms' characteristics. Regulations in Taiwan specify that insiders give three days prior notice to the competent authority of stock transfers and this news can stimulate market participants' investment decisions. We find both the positive and negative abnormal returns exist following insider transfer trade announcements, especially for smaller firm. However, smaller firm sizes associate with larger magnitudes of negative abnormal returns. Furthermore, the connection between smaller firms and those with higher book-to-market ratios strengthens for larger negative abnormal returns.     

Corporate usage of financial derivatives,information asymmetry,and insider trading

This article investigates whether financial derivative usage by Australian corporations constitutes information asymmetry when proxied by profitable trading in the firms' securities by insiders. The findings show that insiders who trade in companies that employ derivatives make larger purchase returns compared to insiders in nonuser firms with regard to trading identity, trading intensity, variability of usage, volume of trading, and industry effects. A plausible explanation is that asymmetry is driven by derivative traders who undertake noisy transactions in firms where risk outcomes were previously transparent. Excess returns are confined to purchase transactions consistent with insiders primarily selling for noninformation reasons. © 2009 Wiley Periodicals, Inc. Jrl Fut Mark 30:25–47, 2010     

The lead–lag relationship between equities and stock index futures markets around information releases

This paper documents a strengthening in the lead of stock index futures returns over stock index returns around macroeconomic information releases. Some evidence of a strengthening in feedback from the equities market to the futures market and weakening in the lead of the futures market around major stock‐specific information releases is also provided. This is consistent with the hypothesis that investors with better marketwide information prefer to trade in stock index futures while investors with stock‐specific information prefer to trade in underlying stocks. A small weakening in the contemporaneous relationship between stock index futures returns and stock index returns around both types of releases is also documented. This is consistent with disintegration in the relationship between the two markets associated with noise induced volatility. One by‐product of this study is new comparative evidence on the performance of adjustments for infrequent trading of index stocks based on a commonly used ARMA technique versus recalculation of the stock index using quote midpoints. The results suggest that the quote midpoint index performs at least as well as the ARMA adjusted index across the entire sample period, as well as around the different types of information releases. © 2000 John Wiley & Sons, Inc. Jrl Fut Mark 20:467–487, 2000     

Late Disclosure of Insider Trades: Who Does It and Why?

We attempt to understand the personal incentives that motivate corporate insiders to engage in unethical behavior such as delayed trade disclosure. Delayed disclosure affects corporate transparency and other shareholders in the firm potentially suffer investment losses because they are unaware of insiders’ activities. Using archival data from the 300 largest Australian firms between 2007 and 2011, the results show that risk factors such as insider age and tenure and wealth effects in the form of insider shareholdings affect the likelihood of delayed reporting. Governance positions such as committee membership mitigate this behavior. Our study highlights the importance of considering individual insider’s wealth and risk factors. The self-monitoring role of governance positions is also indicative of the effectiveness of internal corporate governance in the prevention of illegal insider behavior.     

The Impact of Fraudulent False Information on Equity Values

There are two types of stock price manipulation examined in the theoretical literature: (1) insider trading, which involves private information that is true and (2) the public spreading of fraudulent false information. While there is a large empirical literature on insider trading, this is the first empirical article to examine the impact of false, fraudulent public information on stock prices and trading volume. We find that such false information, even after being denied by a credible source such as the SEC, generates both abnormal returns and abnormal trading volume. We also find that the effects of the false information on security returns and volume can be persistent for at least 2 weeks. In addition, we show that perpetrators of false news attacks can make potentially large profits from such market manipulations.     

后金融危机时期湖北外贸出口的战略选择

作为美国的重要贸易伙伴和世界贸易大国的中国不可避免地受到由美国次贷危机引起的国际金融危机的影响,而作为拉动湖北经济增长＂三驾马车＂之一的湖北外贸出口同样在国际金融危机影响下形势严峻,举步维艰。后金融危机时期湖北为了提高外贸出口的长期竞争力,一方面政府应该加大政策扶持,强化服务,营造良好的企业发展环境;另一方面企业应加快出口品牌建设,科技兴贸,提高国际市场竞争力。此外,行业商会也要努力协调,开拓新兴市场,寻求产品进入国际市场的突破口。     

Country-of-Origin Premiums for Retailers in International Trades: Evidence from eBay's International Markets

Using real-world transaction prices in the Internet auction Web site eBay's U.S., U.K., and global markets, the authors study the price dispersion of homogeneous products related to the sellers’ country-of-origin. For both tangible and intangible products and services, sellers from the United States enjoy a price premium. This premium appears to stem from country-of-origin equity instead of trading risk or product quality. The findings of this research suggest potential profitable opportunities in international trade by employing the retailer's country-of-origin as an arbitrage tool.