保险资金持股与股价崩盘风险——市场“稳定器”还是崩盘“加速器”?

现阶段,有关保险资金持股与资本市场稳定相互关系的讨论多止于推测,少有学者以大样本数据进行实证考察。在理论上,保险资金持股上市公司,一方面可以抑制经理人负面信息隐藏,作为市场“稳定器”降低股价暴跌风险;另一方面,也能引发投资者跟风炒作,导致市场情绪高涨和股价高估,成为股价崩盘风险的“加速器”。本文基于2007—2016年中国沪深两市A股上市公司的数据,实证分析保险资金持股上市公司是否加剧市场暴跌及其作用机制。结果显示:保险资金持股加剧了股价崩盘风险,是公司股价崩盘的“加速器”。这一结论在经过DID模型、工具变量回归、PSM+OLS等内生性分析,以及稳健性检验之后依然成立。进一步研究表明,相比于民营、小型和财产保险公司,在股市投资规模更大的国有、大型和人寿保险公司更能引发市场跟风炒作,加剧股价崩盘风险;不过,当保险资金作为前十大股东参与公司治理时则能够降低股价崩盘风险。本文不仅为保险资金持股与资本市场稳定相互关系的讨论提供了经验证据,也为规范保险资金股权投资,维护资本市场稳定提供有益借鉴。     

Spillovers to low-income countries: importance of systemic emerging markets

This article documents the expanding economic linkages between low-income countries (LICs) and a narrow group of ‘Emerging Market (EM) leaders’ that have become major players in international trade and financial flows. VAR models show that these linkages have increased the share of growth volatility that can be attributed to foreign shocks in LICs. Dynamic panel models further analyse the impact of LIC trade orientation and production structure on the sensitivity to foreign shocks. The empirical results demonstrate that the elasticity of growth to trading partners’ growth is high for LICs in three out of the five regions: Asia, Latin America and the Caribbean, and Europe and Central Asia. However, for commodity-exporting LICs in Sub-Saharan Africa and the Middle East, terms of trade shocks and demand from the EM leaders are the main channels of transmission of foreign shocks     

社保基金投资资本市场的收益-风险研究

资本市场为社保基金保值增值提供了基本工具。对1993—2006年中国资本市场运行的实证研究表明,作为风险量度的投资组合标准差每增加1%,可以获得0.221%的预期收益。尽管中国股票市场风险较大,但是,社保基金一定程度地参与股票市场,不仅可以享受经济增长的红利,而且可以取得投资组合分散风险的结果。     

Does Shariah compliance make interest rate sensitivity of Islamic equities lower? An industry level analysis under different market states

This paper examines the sensitivity of the Dow Jones Islamic market index and its corresponding industry equity indices to changes in the level, slope and curvature of the U.S. term structure of interest rates over the period 1996–2015 using the quantile regression approach. The empirical results reveal that the Islamic stock market has a considerable negative exposure to interest rate risk, although a declining time pattern of interest rate sensitivity is observed. The unexpected changes in the level factor of the U.S. yield curve, closely linked to long-term interest rates, are identified as the most important interest rate factor in explaining the variability of Islamic equity returns. Furthermore, the interest rate exposure tends to be stronger during extreme bearish conditions in the stock market, possibly due to the greater pessimism and risk aversion under these market circumstances. It is also shown that Islamic equities are not different from their mainstream counterparts in terms of interest rate sensitivity, indicating that the Islamic stock market does not provide a cushion against interest rate risk.     

论我国保险基金进入资本市场的策略选择

本文从三个方面论述了中国保险基金必须加快和更大规模地进入资本市场,这既是保险业摆脱困境的必然选择和惟一出路,更是中国金融市场体系得以完善的必然要求和客观规律。最后在认真分析中国证券市场,特别是股票市场严重缺陷的基础上,提出在当前一段时期,中国保险基金如何进入证券市场的六条可行性的对策思路。     

POLICY UNCERTAINTY,ELECTORAL SECURITIES,AND REDISTRIBUTION*

This article investigates how uncertainty about the adoption of a redistribution policy affects political support for redistribution when individuals can trade policy‐contingent securities in the stock market. In equilibrium the support for redistribution is smaller than where no “policy‐insurance market” is available. This implies that in economies with well‐developed financial markets redistribution decreases with the level of participation in these markets and with income inequality. Furthermore, the existence of a policy‐insurance market may lead to a less equal distribution of income than where no insurance is available even if a majority of individuals are redistributing resources through private transfers.     

Costly risk verification without commitment in competitive insurance markets

This paper analyzes the equilibrium of an insurance market where applicants for insurance have a duty of good faith when they reveal private information about their risk type. Insurers can, at some cost, verify the type of insureds who file a claim and they are allowed to retroactively void the insurance contract if it is established that the policyholder has misrepresented his risk when the contract was taken out. However, insurers cannot precommit to their risk verification strategy. The paper analyzes the relationship between second-best Pareto-optimality and the insurance market equilibrium in a game theoretic framework. It characterizes the contracts offered at equilibrium, the individuals' contract choice as well as the conditions under which an equilibrium exists.     

保险资金入市研究

目前我国保险资金年内直接入市已基本成定局.在本文中,笔者简要分析了保险资金直接入市的必要性,继而着重讨论了直接入市后保险公司资产配置的变化及其对我国资本市场发展的影响.     

Lifetime consumption and investment: Retirement and constrained borrowing

Retirement flexibility and inability to borrow against future labor income can significantly affect optimal consumption and investment. With voluntary retirement, there exists an optimal wealth-to-wage ratio threshold for retirement and human capital correlates negatively with the stock market even when wages have zero or slightly positive market risk exposure. Consequently, investors optimally invest more in the stock market than without retirement flexibility. Both consumption and portfolio choice jump at the endogenous retirement date. The inability to borrow limits hedging and reduces the value of labor income, the wealth-to-wage ratio threshold for retirement, and the stock investment.     

Does the traditional exchange rate fully explain firms’ exposure?

This study aims to explore the role of the cross exchange rate as a form of market competition, which has previously been omitted as an explanatory variable in estimating the risk exposure of the standard exchange. To the end, we develop a model of exporting firms that reflects exposure to market interaction and mark-up in a duopolistic export market. Using monthly data of stock returns and cross exchange rates of two oligopoly industries (i.e. semiconductor and steel & iron), our empirical evidence supports our hypothesis that cross exchange rates significantly explain firm value.     

German Exchange Rate Exposure at DAX and Aggregate Levels, International Trade and the Role of Exchange Rate Adjustment Costs

Abstract. This article analyses value changes of German stock market companies in response to movements of the US dollar. The approach followed in this work extends the standard means of measuring exchange rate exposure in several ways, e.g. by using multifactor modelling instead of augmented Capital Asset Pricing Model, application of moving window panel regressions and orthogonalization of overall market risk vis-à-vis currency risk. A further innovation lies in testing the theoretical implications of exchange rate adjustment costs (hedging costs) for firm values and economic exposure. Based on time series and panel data of German Deutsche Aktien Xchange companies, Deutsche Mark/dollar rates and macroeconomic factors, we find a rather unstable, time-variant exposure of German stock market companies. Dollar sensitivity is positively affected by the ratio of exports/gross domestic product (GDP) and negatively affected by imports/GDP. Moreover, as expected from theoretical findings, firm values and exchange rate exposure are significantly reduced by adjustment costs depending on the distance of the exchange rate from the expected long-run mean.     

Disasters,Household Decisions,and Insurance Mechanisms: A Review of Evidence and a Case Study from a Developing Country in Asia

This article investigates whether and how Asian people's exposure to a variety of disasters undermine their decisions and welfare. Our case study from Vietnam, based on household panel data, shows that households adopt a variety of coping strategies against the damages caused by disasters especially through credit and labor markets. While the consumption risk sharing networks function effectively at the commune level, market and non‐market insurance mechanisms are not sufficient, especially at the regional, national, and international levels. Hence, it is imperative to strengthen market, government, and community based insurance mechanisms to diversify aggregate disaster risks at the individual, national, and regional levels in Asia.     

When is market incompleteness irrelevant for the price of aggregate risk (and when is it not)?

In a standard incomplete markets model with a continuum of households that have constant relative risk aversion (CRRA) preferences, the absence of insurance markets for idiosyncratic labor income risk has no effect on the premium for aggregate risk if the distribution of idiosyncratic risk is independent of aggregate shocks and aggregate consumption growth is independent over time. In equilibrium, households only use the stock market to smooth consumption; the bond market is inoperative. Furthermore, the cross-sectional distributions of wealth and consumption are not affected by aggregate shocks. These results hold regardless of the persistence of idiosyncratic shocks, even when households face tight solvency constraints. A weaker irrelevance result survives when we allow for predictability in aggregate consumption growth.     

Social Risk in Health Insurance: A Reflection on the Economies of Scale and Scope in Health Insurance

Social risk causes distortion in the health insurance market. In the presence of social risk, health insurance must be inflated with a safety loading. This implies that policyholder will choose incomplete risk transformation and that health insurers have to build up large capital reserves. By using cross-diversification and enlarging the insurance pool with other kinds of risk (utilising economies of scope in addition to scale production), the problem of social risk will reduce. It is shown how this is possible by using the capital market as a diversification pool     

Australian financial firms’ exposures to the level,slope, and curvature of the interest rate term structure

This study examines the risk exposure of Australian financial firms to changes in the term structure of interest rates. Non-linearity in the interest rate term structure is captured by the three-factor model of interest rate level, slope, and curvature. We observe that financial firms have negative exposures to the interest rate level, while non-financial firms have positive exposures. This finding suggests that financial firms need to hedge against rising interest rates, while non-financial firms need to hedge against falling interest rates. Small banks and insurance companies have a positive risk exposure to the slope factor, while real estate firms have a negative risk exposure to the curvature factor. Though the interest rate level is the most important factor, ignoring the slope and curvature factors could lead to underestimating a financial firm’s overall interest rate risk exposure. These findings are robust to controlling for the orthogonalized market return, time-varying equity risk premium, and the global financial crisis. This study offers practical tools to regulators, such as the Reserve Bank of Australia and Australian Prudential Regulatory Authority for assessing interest rate risk exposures of the financial and non-financial sectors.     

Cash-flow news,market liquidity and liquidity risk

This article adopts Campbell's (1991) return decomposition model to decompose the unexpected stock return and unexpected excess stock return in the US stock market. The study also investigates the factors that cause the shock to stock return and excess stock return. We further examine the responses of stock market to cash-flow news, expected stock return news, expected excess stock return news and interest rate news. Last, we examine the reaction of market liquidity, liquidity risk and abnormal trading volume to cash-flow news, expected stock return news, expected excess stock return news and interest rate news. Our main findings are summarized as follows: first, cash-flow news is the main driver of stock return and excess stock return in stock market. Second, the dividend payout ratio is able to predict stock return and excess stock return. Third, under the model of stock return variance, unexpected market liquidity and unexpected liquidity risk are negatively related to expected stock return news, but not related to cash-flow news. Fourth, under the model of excess stock return variance, unexpected market liquidity and unexpected liquidity risk are negatively related to cash-flow news, expected excess stock return news, and interest rate news.     

Modeling the dependence structure between default risk premium,equity return volatility and the jump risk: Evidence from a financial crisis

This paper investigates the dependence structure between default risk premium, equity return volatility and jump risk in the equity market before and during the subprime crisis. Using iTraxx CDS index spreads from Japanese and Australian markets, the paper models the different relationships that can exist in different ranges of behavior. We consider several Archimedean copula models with different tail dependence structures, namely, Gumbel, Clayton, Frank, AMH and Joe copulas. Although the dramatic change in the levels of the iTraxx CDS index, we find strong evidence that the dependence structure between CDS and stock market conditions is asymmetric and orienting toward the upper side. In addition, we find that the Japanese CDS market is more sensitive to the stock return volatility than the jump risk and the magnitude of this sensitivity is related to the market circumstances. However, Australian CDS market is more sensitive to the jump risk than stock return volatility before and during the financial crisis. This result has important implications for both global financial stability and default risk management. Specifically, the heterogeneity of markets, coupled with the diversity in the risk exposures cause the default risk premium and equity markets to exhibit different levels of sensitivity.     

流动性、股票定价及时变性：来自我国沪深股市的经验证据

本文在经流动性风险调整的资产定价模型的基础上,通过引进四个工具变量,构建了一个检验模型,于时间序列上对中国股票市场进行了实证分析。实证结果显示：我国的股市流动性单位风险溢价于时间序列上存在显著的时变性。从而证实了投资者之内生流动性风险对股票收益率之影响效应,进而揭示了一个货币供给量影响股市的一个作用机制,即股票价格的涨跌由于流动性水平的不同和由前者导致的流动性风险溢价要求的不同而受到影响。     

巨灾风险下的投保行为 ——基于实验理论的研究

中国尚无巨灾保险市场,研究人们在巨灾风险下的投保行为对巨灾保险市场的建立与发展都具有重要的意义。本文以地震风险为例,运用实验经济学的方法,探讨了个体面对巨灾风险时的投保行为与相关理论问题。研究结果表明,人们的投保决策受其对风险概率认知的影响较小,知道清晰的风险概率甚至会降低投保率;在实验中引入仿真信息,将诱导被试投保;而过往受灾经历影响较大,且这种影响并不一定需要亲身经历才能形成,知晓他人遭受灾难也能唤起人们的投保意识。通过扩展传统的实验理论,实验室实验被应用到了这种因难以控制变量而研究较少的领域,并发现了投保行为的某些特征。     

资本市场开放与企业真实盈余管理——基于“陆港通”的经验证据

资本市场开放不仅是扩大国际融资、更好地利用国际金融市场的需要,而且对我国资本市场发育和上市公司行为具有多重外部治理效应。本文借助我国内地与香港资本市场互联互通机制这一准自然实验,研究资本市场开放对企业真实盈余管理的影响。研究发现:(1)总体上,“陆港通”机制的实施显著降低了标的公司真实盈余管理程度。(2)委托代理问题是企业进行盈余管理的重要原因,而“陆港通”机制开通后,能够缓解标的公司代理矛盾,进而约束管理层的真实盈余管理行为。(3)当资本市场信息环境改善、管理层面临较大股票抛售压力以及大股东监督力度较强时,“陆港通”抑制企业真实盈余管理行为的治理效果更强。本文结果表明,资本市场开放有助于提高我国上市公司财务信息披露质量及公司治理水平。