Stock market surveillance and market performance: The case of Taiwan

In this paper we investigate the effect of warning announcements on the price behaviour of stocks. We also study the effects of various corrective treatments (trading halts, call trading and 100% payment/delivery with order) on the performance of stocks in the Taiwan stock market. It is found that warning announcements serve to improve the performance of stocks, except in the case of consecutive warnings. Generally speaking, the corrective measures taken after the consecutive warnings are able to reduce the volatility, the abnormal returns and the excess liquidity of the stocks.The authors are Professors from the National Sun Yat-sen University, and the Securities and Exchange Commission respectively.     

CPF stocks: Prices,returns and volatility

We identify a unique phenomenon in the Central Provident Fund (CPF) stocks where stock prices increase in the absence of fundamental changes in firm value. CPF stocks are stocks endorsed by the Central Provident Fund Board in Singapore as approved investment for its members. CPF stocks offer significant price appreciation and value preservation as well as abnormal returns in the bull market before the October 1987 market crash. We find evidence of noise trading in bull markets and price pressure effects that persist through bearish market conditions.The authors are from the Department of Finance and Banking, National University of Singapore.     

股权分置改革与股票需求价格弹性——基于供给需求的理论框架和经验证据

股票需求的完全价格弹性这一假设是许多金融理论的基础。然而,真实市场上的股票并非是相互替代的,股价与市场供给有关。本文在中国股权分置改革的背景下,建立股票供给和需求的理论模型,分析在需求和供给变动两个冲击下,流通股股东的累积超额收益。我们进而利用市场模型和市场调整模型,计算流通股股东在股改复牌前后的累积超额收益,并分析检验其截面影响因素。实证检验发现,累积超额收益和远期股票供给量成负相关关系。在控制流通股供给冲击效应之后,我们还发现公司盈利能力和非流通股集中度与股改价格效应负相关。进一步考虑市场时机和内生性问题后,结论仍然稳健。本文创造性地度量了股权分置改革经济价值的市场预期,并提供了需求曲线斜率为负的经验证据。     

The Impact of Leveraged and Inverse ETFs on Underlying Real Estate Returns

Leveraged and inverse ETFs (LETFs) were introduced in 2006. By 2008 there was concern that the requirement of LETFs to rebalance near the close might have a significant impact on the prices of the stocks in the underlying indexes. We examine the impact of trading activity induced by six real estate‐related LETFs on the late‐day price dynamics of 63 real estate sector stocks. Through a comparison of sample and control stocks and through a regression model of LETF rebalancing, we find that these LETFs significantly impact the prices of component stocks, increase their volatility and contribute to price momentum.     

After The Fall: Stock Price Movements and the Deterrent Effect of Antitrust Enforcement

In this paper, we utilize data on stock price movements of firms indicted on price-fixing charges to infer expectations of antitrust recidivism. Specifically, a return of the firm's (market-adjusted) asset value to its pre-indictment level in the post-indictment period is taken as evidence of stockholders' expectations of a return to collusive behavior. From these data, we are able to make direct inferences about the effectiveness of antitrust enforcement actions. Importantly, we find that the stock prices of 85 percent of the firms in our sample had regained 100 percent of their pre-indictment levels within one year of the antitrust action. Such widespread and rapid stock price appreciation casts doubt on the durability of thedeterrent effect of Section 1 enforcement.     

季琦：创业让我很上瘾

“我记得我的第一个报道就是《IT经理世界》做的，”季琦见到记者脱口而出的第一句话就显示出惊人的记忆力，连细节都没有放过，“那时候我还在携程，在香格里拉的大堂里采访，印象很深刻。”那时，初出茅庐的季琦对媒体的采访备感新奇，2000年10月16日，携程在北京天伦王朝酒店召开发布会，宣布收购当时中国最大的酒店预订中心——现代运通，遇到电视台采访，季琦还和其他创始人为谁上镜头而争吵不休。     

Cooperative R&D and the Value of the Firm

In this paper, we investigate the stock price responses of listed firms in the U.S. markets to announcements of R & D collaborations. We find that abnormal returns of stocks are significantly positive after R & D collaborations are announced. The positive stock price response towards the R & D cooperation initiations can be partially explained by the nature of the collaborations and the characteristics of the participating firms. We also find that the stock prices of rival firms respond negatively to announcements of R & D cooperation. This result seems to support the hypothesis that cooperative R & D improves economic efficiency of the cooperative firms that gain competitive advantage. We do not find evidence supporting the hypothesis that R & D cooperation creates collusive, anticompetitive effects in the product market.     

The Ex‐Day Price Behavior of REITs: Taxes or Ticks?

Taxes and microstructure constraints are often cited as possible explanations for why stock prices drop by less than the dividend on their ex‐dates. Using a sample of real estate investment trusts, which have no significant correlation between dividend size and yield, we find that close‐to‐open ex‐dividend price drops are related to dividend size as suggested by the microstructure models, but close‐to‐close price drops are related to dividend yield as predicted by the tax theory. These results imply that overnight price drops are primarily determined by microstructure, but that trading during the ex‐day causes prices to adjust to reflect individual tax preferences.     

郑煤集团优化国有股权结构的探索与实践

介绍了郑煤集团国有股权结构的3种形态,分析了集团公司通过优化股权结构,实现产权多元化后所取得的成效。并提出进一步优化国有产权的思路,如解决新井建设资金、为企业发展募集建设资金、优化辅业单位股权,国有股份逐步退出等举措,实现国有资本保值增值,提高企业竞争力。     

Price-volume relation in stocks: A multiple time series analysis on the Singapore market

We examine the price-volume relation in stocks using the multiple time series approach due to Tiao and Box (1981). This approach has the advantage of treating price and volume jointly and symmetrically (without enforcing the roles of input and output). It is free of the simultaneity bias in regression analysis and the unidirectional dynamics imposed by transfer function models. Empirical results show that there is implicit positive correlation between price and volume through their residuals. However, the results for the explicit lead and lag relations are mixed. The technical analysts' adage that volume often leads the trend of price is not supported. Nonetheless, the implicit relationship between price and volume confirms the usefulness of incorporating volume data to forecast future return. Our analysis shows that the multiple time series models outperform the univariate models in post-sample forecasts.     

代理问题、公司治理与企业价值--以民营上市公司为例

本文运用代理理论对2002年在上海、深圳证券交易所上市的122家民营上市公司治理与企业价值进行理论分析与实证检验,发现民营上市公司治理包括在股权集中度、债务融资比重、金字塔式控股、控制权与现金流权偏离、流通股与非流通股价偏离等五个方向上存在着代理冲突,并指出引发民营上市公司代理冲突的首要原因是现行流通股与非流通股的股权割裂。     

Do Asian stock market prices follow martingales? Evidence from spectral shape tests

This paper examines the martingale hypothesis for five Asian stock markets using the spectral shape tests of Durlauf (1991). Unlike the variance ratio test employed in previous studies (eg, Panet al, 1991), the spectral shape tests are consistent againstall stationary alternatives to the martingale null.The spectral shape tests were applied to daily and weekly returns on the stock indices of Thailand, Hong Kong, Korea, Malaysia and Taiwan over a period of 17 years. The results show that the martingale null is rejected for most markets. There is some evidence that the rejections may be due to low frequency or long memory influences.The authors are lecturers, Department of Finance and Banking, National University of Singapore. This paper was presented at the Third International Conference on Asian-Pacific Financial Markets, September 9–11, 1993 in Singapore. We have benefited greatly from the comments of Y K Tse and other conference participants.     

Change at the Checkout: Tracing the Impact of a Process Innovation

Barcode scanners, introduced in the early 1970's, were a foundational process innovation in the grocery supply chain. By 1984 scanners had been installed in 10% of food stores in the U.S. Fixed‐effect analysis of city‐level price data shows that scanners reduced prices of groceries by at least 1.4% in their first decade. The results are consistent with prior estimates of labor saving by scanners. Early adopters and adopters in states that imposed fewer restrictions on complementary process innovations contributed disproportionately to the price decreases.     

Payment choice of M&As: Financial crisis and social innovation

The payment choice of mergers and acquisitions (M&As) influences firm performance and facilitates wealth transfer to shareholders and realises synergy through stakeholders' implicit contract. This study examines the choice of payment methods and firm-level characteristics of UK M&As during the financial crisis referring to the business-to-business (B2B) market in a broader sense. Further, conceptualising social innovation as a process-outcome-value construct, this study evaluates the choice of payment methods and firm-level characteristics of M&As through the lens of corporate social responsibility (CSR). The findings suggest that a stock payment method is favoured well over a cash payment method by the acquirers of M&A firms and firms that are pursuing social innovation through CSR activities. The results further document that a volatile market affected by the financial crisis reacts to the financing choice of M&As, making a sizable impact on firms' capital structure, ownership concentration, and asymmetric information. Acquiring firms that opt for stock payment methods register a significant increase in their firm-level characteristics, such as market-to-book-value, deal value, growth, and CARs compared to the cash payment method deals.     

Governance and capabilities: Asia’s entrepreneurial performance and stock of venture forms

Asian economies display large evident differences in their entrepreneurial capabilities and performance. While existing explanations of these differences have largely focused on formal and informal background institutions, we instead emphasize differences in national stocks of venture forms. We suggest that alternate venture forms, because of their different governance characteristics, possess unique entrepreneurial capabilities and pursue distinct opportunities. Consequently, nations must possess a diverse and balanced stock of venture forms and have such forms engaged in the unique and complementary activities for which they are best suited. Viewed in this light, addressing national limitations in entrepreneurial performance requires changes in stocks of venture forms. In developing the policy implications of our analysis, we highlight the past successes and current development challenges of Japan, Korea, Singapore, Hong Kong, Taiwan, and mainland China.     

Broadband Internet access,awareness, and use: Analysis of United States household data

Data obtained from a nationwide survey of US residences during September and October 2002 are used to investigate household awareness of high-speed Internet access, profile Internet access and use, and gain insight into how important always-on, price, speed, installation, and reliability attributes are in their choice of service. Preliminary analysis suggests relatively high awareness of cable modem and DSL availability. Almost 19 percent of the sample have high-speed connectivity, and the mean price paid per month for dial-up and high-speed access is $19.76 and $42.36, respectively. Preference for high-speed access is apparent among households with higher income and college education. About 63 percent of high-speed users have more than five years of online experience, compared to 48 percent of dial-up users, and high-speed users are twice as likely to share music files and photos, bank, trade stocks, and pay bills “many times a week” than dial-up users. Willingness-to-pay estimates indicate reliability of service, speed, and always-on connectivity are important Internet access attributes.     

Index fund optimization using a hybrid model: genetic algorithm and mixed-integer nonlinear programming

Abstract

Index funds consist of a subset of stocks, an index tracking portfolio, included in the market index. The index tracking portfolio aims to match the performance of the benchmark index. In this paper, we propose a hybrid model for solving the multiperiod index tracking problem, which includes rebalancing concerns, transaction costs, limits on the number of stocks, and diversification by sector, market capitalization, and stock weight. Our hybrid model combines the genetic algorithm (GA) to select stocks of the index tracking portfolio and mixed-integer nonlinear programming (MINLP) to estimate its weights. Finally, we apply our proposed hybrid model to the S&P500 to find an index tracking portfolio that includes those constraints. The results show that our hybrid model is able to create an index fund whose return rate is similar to the market index with significantly lower risk.     

Analyzing the impact of user-generated content on B2B Firms' stock performance: Big data analysis with machine learning methods

Marketing scholars are interested in the big data of user-generated content (UGC) from social media platforms. However, the majority of current UGC studies have been conducted in the business-to-consumer (B2C) context. To fill the knowledge gap in business-to-business (B2B) research, we investigate whether UGC has differential impacts on stock performance for B2B and B2C firms by using big data. We collect a large dataset of 84 million tweets from 20.3 million Twitter accounts and 8 years of stock data for 407 companies from the S&P500 index. The results from machine learning methods are transformed into a monthly panel data. We conduct fixed effects model on the panel data. We find that UGC has a significant impact on firms' stock performance and that its impact on stock performance is much stronger among B2C firms than among B2B firms. While consumers' positive sentiment does not play a significant role in stock performance, consumers' negative sentiment and WOM significantly impact stock prices.     

The Substitutability of Real Estate Assets

This paper investigates the degree of substitutability between securitized real estate assets and real estate assets whose prices are appraisal-based. Given the insensitivity of unsecuritized asset's returns to the returns on stock market indices, equilibrium asset pricing models cannot be used to compare these two avenues of investment. Two assets are deemed substitutable if the information sets underlying unbiased, minimum error variance estimates of their pricing parameters are identical. The empirical evidence shows that the prices of the transactions-based assets—real estate investment trusts and the stock price index of the home building industry—follow a random walk while the prices of the appraisal-based assets—FRC/NCREIF indices—do not. The variance decompositions of the vector autoregressions also show that the level of economic activity helps predict the price indices of appraisal-based assets while the stock market index and the term structure of interest rates are better predictors of the prices of transactions-based assets     

Market Microstructure and Real Estate Returns

This paper examines the Real Estate Investment Trust (REIT) market microstruc-ture and its relationship to stock returns. When compared with the general stock market, REIT stocks tend to have a lower level of institutional investor participation and are followed by fewer security analysts. In addition, REIT stocks that have a higher percentage of institutional investors or are followed by more security analysts tend to perform better than other REIT stocks. Our results seem to confirm Jensen's ( 1993 , p. 868) proposition that ownership structure (that is, who owns the firm's securities) affects the value of the firm. Our findings also have implications about the well documented phenomenon that the financial performance of Commingled Real Estate Funds (CREFs) is better than that of REITs.