个人大股东持股与股价暴跌风险

本文以2007至2016年中国A股上市公司为样本,考察了个人大股东持股与股价暴跌风险之间的关系。研究发现:第一,个人大股东持股比例的增加能够显著降低公司未来股价暴跌风险。这一结论在剔除了个人大股东中董监高持股数量、进行内生性处理、更换不同统计检验方法后依然成立。第二,个人大股东持股对公司管理层监督的效果并不明显,个人大股东持股比例的增加对于公司应计盈余管理、真实盈余管理、投资效率、过度投资等可能影响公司股价暴跌风险的经营指标并没有显著影响。第三,个人大股东的持股加强了公司股权制衡的力度,进而显著降低了公司股价暴跌风险。股权制衡机制解释了大股东持股对股价暴跌风险一半以上的影响。本文的研究对于全面认识个人大股东在资本市场中发挥的作用,促进股市平稳发展具有重要的理论和现实意义。     

Deep hedging

We present a framework for hedging a portfolio of derivatives in the presence of market frictions such as transaction costs, liquidity constraints or risk limits using modern deep reinforcement machine learning methods. We discuss how standard reinforcement learning methods can be applied to non-linear reward structures, i.e. in our case convex risk measures. As a general contribution to the use of deep learning for stochastic processes, we also show in Section 4 that the set of constrained trading strategies used by our algorithm is large enough to ε-approximate any optimal solution. Our algorithm can be implemented efficiently even in high-dimensional situations using modern machine learning tools. Its structure does not depend on specific market dynamics, and generalizes across hedging instruments including the use of liquid derivatives. Its computational performance is largely invariant in the size of the portfolio as it depends mainly on the number of hedging instruments available. We illustrate our approach by an experiment on the S&P500 index and by showing the effect on hedging under transaction costs in a synthetic market driven by the Heston model, where we outperform the standard ‘complete-market’ solution.     

Fiscal transparency,government effectiveness and government spending efficiency: Some international evidence based on panel data approach

The global financial crisis and the debt crisis of the EU countries revealed serious weaknesses in fiscal reporting. As a consequence, uncertainties regarding the real situation of the public accounts of the countries raised doubts in relation to the effectiveness of government policies. Since then, countries are undertaking reforms in order to improve fiscal transparency. This paper analyzes whether countries are making efforts to enhance fiscal transparency, and whether fiscal transparency affects government effectiveness and government spending efficiency. We consider two channels through which this effect occurs. The first channel is indirect and it works through public debt. The second channel is the direct effect that transparency has on government effectiveness and government spending efficiency once transparency enhances accountability and thus the task of resource allocation. We use a sample of 82 countries (68 developing and 14 developed) for the period 2006–2014, and panel data analysis. Comparing the scores of fiscal transparency between 2006 and 2014, we observe that approximately 80 per cent of the countries made efforts to improve fiscal transparency. The results suggest fiscal transparency is important to reduce public debt and to improve government effectiveness and government spending efficiency.     

Austerity,inequality, and private debt overhang

Using panel data of 17 OECD countries for 1980–2011, we find that the distributional consequences of fiscal consolidations depend significantly on the level of private indebtedness. Austerity leads to a strong and persistent increase in income inequality during periods of private debt overhang. In contrast, there are no discernible distributional effects when private debt is low. This result is robust to alternative identifications of fiscal consolidations, to different ways of defining periods of private debt overhang, and to controlling for the state of the business cycle and the level of government debt. We explore different channels through which our findings can be rationalized.     

Measuring the increasing connectedness of Chinese assets with global assets: using a variance decompositions method

This study uses the network topology of variance decompositions to investigate the connectedness of four assets (stocks, bonds, foreign exchange and commodities) across five countries (US, EU, UK, Japan and China). We find that connectedness to and from the Chinese asset markets increased significantly from 2013 to 2018, which reveals that Chinese assets have gradually become integrated into the global economy. We also investigate the volatility connectedness in economically fragile periods and find that the Chinese market acted as a transmitter of volatility in the 2015 Chinese stock crash. This finding is potentially essential to modern risk measurement and management.     

房地产业对金融机构的系统性风险溢出效应研究——基于行业与企业综合视角的实证分析

房地产业与金融业具有强烈的共生性，当房地产业陷入困境时，是否会迅速扩散到与其关联的各类金融机构，蔓延并危及整个金融系统，出现房地产业对金融机构的"系统性风险溢出"?文章综合运用房地产行业指数与房地产企业数据，基于CoVaR模型和分位数回归方法，测算了我国房地产业对各类金融机构的系统性风险溢出强度，分析了其时变趋势和影响因素。实证结果表明，我国房地产业对金融机构存在较为显著的系统性风险溢出效应，在时间维度上存在周期性；房地产业对股份制与城商行的风险溢出强度最大，其次是保险机构和信托，最小的是国有银行；房地产企业的自身风险、规模和负债水平对风险溢出强度具有显著影响。据此，文章对金融监管部门、金融机构与房地产行业提出了相应的政策建议。     

地理距离、契约设计与企业内部资本市场借贷风险防控——来自中国企业集团内部借贷交易的证据

地理因素对保持距离型市场交易的影响已被大量文献证实,但系统考察地理因素是否以及如何影响企业内部经济活动的研究仍十分匮乏。基于手工搜集整理的企业集团内部委托贷款这一独特数据,我们实证考察了地理距离对企业集团内部借贷契约设计的影响及相关的风险防控问题。实证结果显示,借贷距离越远,针对借款者的契约设计越严苛,不仅贷款者更可能要求借款者提供抵押担保,而且对资金用途施加限制的概率也大幅增加。进一步研究发现,与地理距离阻碍了信息搜集和监督的经济直觉一致,距离对企业内部借贷契约严苛性的推高作用会因为借贷双方之间的信息摩擦问题差异而改变。而且,基于借贷违约信息的检验结果表明,作为应对信息不对称的机制,动态调整契约严苛性这一精巧契约设计有效降低了企业内部贷款违约风险。本文不仅增进了对地理因素影响企业内部资本配置的认识,而且加深了对企业内部借贷契约设计的理解,从而对如何有效防控企业内部资本市场运作风险具有启示意义。     

Fraud risk management: A small business perspective

Small businesses face big challenges when it comes to managing fraud risks. Financial strain, rapid growth, and a lack of resources and expertise create ample opportunity for motivated fraudsters to take advantage of small businesses. In this article, we draw upon insights from our years as fraud investigators to offer seven practical recommendations to help small business leaders prevent and detect fraud in this unique environment. These strategies can help even the smallest company make a big difference when it comes to fraud risk management.     

How does the sensitivity of consumption to income vary over time? International evidence

This paper studies how the sensitivity of consumption to income has changed over time as the degree of financial integration has risen. In standard theory, greater financial integration facilitates international borrowing and lending, helping to reduce the sensitivity of consumption growth to fluctuations in income. We examine the empirical validity of this prediction using an array of indicators of financial integration for a large sample of advanced and developing countries over the period 1960–2011. We report two main results. First, the sensitivity of consumption to income has declined over time as the degree of financial integration has risen. The decline has been more pronounced in advanced economies than in developing ones. Second, our regression analysis indicates that a higher degree of financial integration is associated with a lower sensitivity of consumption to income. This finding is robust to the use of a wide range of empirical specifications, country-specific characteristics and other controls, such as interest rates and outcome-based measures of financial integration. We also discuss other potential sources of the temporal changes in the sensitivity of consumption to income.     

Competition,concentration and risk taking in Banking sector of MENA countries

This paper tests the relationship between competition and bank stability for 356 banks operating in the Middle East North Africa (MENA) countries during the period 2005–2012. Our results show that for the overall sample, a U-shaped relationship between competition and banks’ risk taking for MENA banks. The negative linear relationship between Z-Score and H-statistics in Gulf countries shows that an increase in competition leads to a reduction in the level of financial stability. In the case of other non-Gulf countries, the increase of competition in uncompetitive markets can lead to an increase in stability. The results confirm the importance of the market structure as an explanatory factor for financial stability, but also indicate that concentration is not associated with uncompetitive markets.