Price gap anomaly in the US stock market: The whole story

This paper analyses the price gap anomaly in the US stock market (comprised of the DJI, S&P 500 and NASDAQ) covering the period 1928 to 2018. This paper aims to investigate whether or not price gaps create market inefficiencies. Price gaps occur when the current day’s opening price is different from the previous day’s closing price due orders placed before the opening of the market. Several hypotheses are tested using various statistical tests (Student’s t-test, ANOVA, Mann-Whitney test), regression analysis, and special methods, that is, the modified cumulative returns and the trading simulation approaches. We find strong evidence in favour of abnormal price movements after price gaps. We observe that during a gap day prices tend to change in the direction of the gap. A trading strategy based on this anomaly was efficient in that its results were not random, indicating that this market was not efficient. The momentum effect was found to be temporary and no evidence of seasonality in price gaps was found. Lastly, our results were also contrary to the myth that price gaps tend to get filled.     

An excellent approximation for the m out of n day provision

The m out of n day provision (MooN) of convertible bonds is difficult to handle. To approximating the MooN better, this paper proposes an approach named the conditional range probability (CRP). CRP is the simulated probability of the MooN being reached within a price range at a future time, conditional on today’s price of the underlying, and can be incorporated into any conventional derivatives pricing method. For a purposely designed exotic call option with a 20 out of 30 day provision, CRP under finite difference is found to outperform significantly several existing approaches and produce a mean pricing error of 1% over a wide range of initial underlying prices for the exotic call. The result implies that finite difference utilizing CRP will yield excellent approximating prices for convertible bonds.     

Shrinking the cross-section

We construct a robust stochastic discount factor (SDF) summarizing the joint explanatory power of a large number of cross-sectional stock return predictors. Our method achieves robust out-of-sample performance in this high-dimensional setting by imposing an economically motivated prior on SDF coefficients that shrinks contributions of low-variance principal components of the candidate characteristics-based factors. We find that characteristics-sparse SDFs formed from a few such factors—e.g., the four- or five-factor models in the recent literature—cannot adequately summarize the cross-section of expected stock returns. However, an SDF formed from a small number of principal components performs well.     

Labor migration and the decoupling of the crop-livestock system in a rural mountainous area: Evidence from Chongqing,China

Massive out-migration of rural labor force brings both challenges and opportunities to crop-livestock integrated production system (crop-livestock system) in smallholder economy. Compared with previous researches that have paid major attention to the effect of labor migration on either crop production or livestock husbandry, this study considers the mediating role of crop production in predicting the effect of labor migration on livestock raising. Our econometric estimation based on a 2012 survey of 974 rural households in Chongqing, a mountainous region of China, showed the following. (1) The massive migration of rural labor force had led to significant increase in farmland abandonment and considerable changes in the pattern of livestock raising. (2) The livestock raising number per household began to differentiate, with the livestock system separating from the traditional crop-livestock system and becoming a specialized business. (3) In terms of the pathways through which rural labor migration exerts impact on livestock raising number, though the increased opportunity costs of rural labor greatly reduced farmers’ willingness to raise livestock, the decoupling of the crop-livestock system partly alleviated the declining trend in the livestock raising number because of the availability of household labor force freed from cropping via farmland abandonment. These findings have important policy implications for rural development and agricultural restructuring in mountainous areas of China, and provide references for other developing countries.     

Funding liquidity risk and the low-volatility anomaly: Evidence from the Taiwan stock market

We investigate whether the funding liquidity risk to institutional investors influences the negative relation between expected returns and variance (the ‘‘Low-volatility anomaly’’). With the Taiwan stock market as a setting, we implement a multivariate Markov switching model and use the funding liquidity risk to model the time-varying transition probabilities of the regime-switching process to capture changes in the funding liquidity risk regime. Our evidence documents that the low-volatility anomaly is most pronounced when there is high funding liquidity risk. When there is low funding liquidity risk, however, the low-volatility anomaly has a significant reversal. These results imply that the increased funding liquidity risk due to financial shock transmitted from parent banks is associated with higher selling pressure on institutional investors’ high-volatility stocks, leading to the low-volatility anomaly.     

How much slack was there in the Chinese economy prior to its economic reform of 1978?

The existence of economic slack or inefficiency is a common phenomenon of economies that operate under mandatory central planning. It implies that the economy operates in the interior of its set of production possibilities and not on its frontier. It also implies that output can be increased without any increase in the inputs if the constraints which prevent the economy from operating on the frontier in the first place are removed. Thus, there is “surplus potential output” that is not directly observable and cannot be identified by conventional analysis of the relationship between inputs and output alone. The objective of this study is to attempt to identify and estimate the surplus potential output in the Chinese economy prior to its economic reform in 1978. This will help answer the question of how much of the Chinese economic growth since 1978 can be attributed to the reduction and elimination of the pre-existing economic slack. This question is important because the increase in output due to the reduction or elimination of the economic slack can only take effect once and cannot be continuing. It will also affect the attribution of the sources of Chinese economic growth. Our investigation suggests that a reasonable estimate of the magnitude of the surplus potential output of the Chinese economy on the eve of its reform is approximately 50% of the actual realized output in 1978.     

Competition in the stock market with asymmetric information

We build a game theoretical model to examine how the level of information advantage of insiders and the competition between insiders and sophisticated investors affect stock price movements and traders’ trading strategies and profits. We show that the competition between insiders and sophisticated investors can reduce the losses of less sophisticated investors, and thus alleviates the disadvantaged position of the less sophisticated investors. Further, traders’ profits are affected by the accuracy of insiders’ private information, and the number of days that insiders have obtained the information in advance. These findings show the importance of information transparency and the role of sophisticated investors in limiting insiders’ trading advantages and mitigating the expropriation of investors by insiders.     

An exploration of the ‘dark side’ associations of conflict,power and dependence in customer–supplier relationships

The purpose of this paper is to present the findings from a critical literature review of the ‘dark side’ issues related to three constructs, namely conflict, power and dependence, in customer–supplier relationships. Previous research has focused on discrete characteristics that influence relationships, but there is a paucity of research that considers the intertwining of a set of characteristics that may create darker associations or consequences for relationships. The paper contributes to IMP literature through this investigation of darker associations of relationships as much of the previous literature on customer–supplier relationship development has been concerned with building trust, developing commitment or managing long-term goals and mutuality (IMP Group, 1982).The paper considers the research on conflict, power and dependence in relationships, tracing its development from January 1980 to the end of 2014, and assessing the dark side issues raised in previous research, placing particular emphasis on ‘asymmetric’ customer–supplier relationships.The contribution of the paper lies in its critique of this focused body of literature and in the development of a better understanding for future IMP researchers on the derivations, foundations and findings concomitant to the ‘dark side’ of conflict, power and dependence in customer–supplier relationships. The paper proposes themes and future avenues of research related to the dark side of conflict, power and dependence, placing emphasis on the ‘bi-polarity’ of each relationship characteristic, the dynamics of relational benefits, the consequences of their evolution on inter-organizational trust and its impact on the dark side of relationships. Hence, the paper contributes through the identification of potential research areas and propositions to guide future conceptual developments in the field.     

Responding to negative online reviews: The effects of hotel responses on customer inferences of trust and concern

Our research examines the perceptions and evaluations of prospective customers toward an online negative review and any accompanying hotel response. The study explores two main issues: whether the presence (versus absence) of an organizational response to negative customer reviews affects the inferences potential consumers draw about the target business, and which aspects of responses affect their impressions. We test the effects of four variables associated with a response: source of response, voice of responder, speed of response, and action frame on two outcomes variables (i.e., customer concern and trust inferences). The provision of an online response (versus no response) enhanced inferences that potential consumers draw regarding the business's trustworthiness and the extent to which it cares about its customers. Using a human voice and a timely response yielded favorable customer inferences. Inferences did not vary with response source or action frame. Implications are drawn for effective management of negative online reviews.