Earning the right premium on the right factor in portfolio planning

The optimal portfolio as well as the utility from trading stocks and derivatives depends on the risk factors and on their market prices of risk. We analyze this dependence for a CRRA investor in models with stochastic volatility, jumps in the stock price, and jumps in volatility. We find that the compartment of the total variance into diffusion risk and jump risk has a small impact on the utility in an incomplete market only. In contrast, the decomposition of the equity risk premium into a diffusion component and a jump risk component and the compartment of the latter into its various elements has a huge impact on the utility in a complete market. The more extreme the market prices of risk, i.e. the more they deviate from their equilibrium values, the larger the utility of the investor. Additionally, we show that the structure of the optimal exposures to jump risk crucially depends on which elements of jump risk are priced.     

Asset pricing in China's domestic stock markets: Is there a logic?

China's stock markets have grown rapidly since their inception and have become an increasingly important emerging market for international investors. However, there are few systematic studies on how asset prices are formed in Chinese domestic equity markets; popular financial media even depict the market as irrational. In this paper, we study the asset pricing mechanism in the nascent Chinese stock markets, with the objective of identifying variables that capture the cross-sectional variation in average stock returns. We focus on the effects of various market imperfections in China. We find that while the market risk (beta) is not priced, there is a significantly negative relationship between firm-specific risk and expected returns. Chinese investors are willing to pay a significant premium for more liquid stocks or for dividend-paying stocks. Furthermore, investors value local A-shares more if there are offshore counterparts (e.g., B- and H-shares) for foreigners, implying that a Chinese firm with a foreign shareholder base has a lower cost of capital, ceteris paribus. Lastly, as with U.S. and other mature markets, firm size and the book-to-market ratio are systematically related to stock returns. Given market imperfections, stocks are priced rather rationally in China, despite the widespread perception to the contrary.     

The usefulness of firm risk disclosures under different firm riskiness,investor-interest,and market conditions: New evidence from Finland

To date, there is only meager research evidence on the usefulness of mandatory annual report risk disclosures to investors. Although it has been argued that corporate disclosure decreases information asymmetry between management and shareholders, we do not know whether investors benefit from high-quality risk reporting in a highly regulated risk disclosure environment. In this paper, we performed association tests to examine whether the quality of firms' mandatory risk disclosures relate to information asymmetry in the Finnish stock markets. In addition, we analyzed whether the usefulness of risk disclosures depends on contingency factors such as firm riskiness, investor interest, and market condition. We demonstrate that the quality of risk disclosure has a direct negative influence on information asymmetry. We also document that risk disclosures are more useful if they are provided by small firms, high tech firms, and firms with low analyst coverage. We also found that momentum in stock markets affects the relevance of firms' risk reports.     

中国利率市场的价格发现——对国债现货、期货以及利率互换市场的研究

本文采用信息份额模型和基于向量自回归(VAR)模型的格兰杰因果检验,研究了国债现货、国债期货和利率互换三个市场之间的价格发现机制。信息份额模型表明,从整体来看利率互换相对于国债期货和国债现货都具有信息优势,而国债期货相对于国债现货具有信息优势。另外,国债期货的价格发现能力相对于另外两个市场都在随时间增强。格兰杰因果检验结果显示,利率互换在价格发现中单向引领国债期货以及国债现货,国债期货单向引领国债现货。所有结果一致表明, 利率互换和国债期货这两种利率衍生产品在引导中国利率市场价格发现中发挥了重要作用。     

An international CAPM for partially integrated markets: Theory and empirical evidence

This article proposes a theoretical testable capital asset pricing model for partially segmented markets. We establish that if some investors do not hold all international assets because of direct and/or indirect barriers, the world market portfolio is not efficient and the traditional international CAPM must be augmented by a new factor reflecting the local risk undiversifiable internationally. We also introduce a suitable framework to test this model empirically. Using a sample of six emerging markets and three mature markets, we find that the degree of stock market integration varies through time and that most of the sample emerging markets have become more integrated in the recent years. The local risk premium for emerging markets represents the most important component of the total risk premium, but its relative importance has decreased recently. Differently, the total risk premium for developed countries is largely driven by global factors.     

International equity diversification and shortfall risk

International equity diversification benefits Canadian investors very substantially by reducing shortfall risk, as shown by results of a model that minimizes the risk of shortfall from a desired consumption level for a retired investor with an unknown date of death and stochastic investment returns. It does not benefit American investors materially. The United States equity market is a large proportion of the international equity market that is available to individual investors, and United States returns are highly correlated with other markets.     

The reinvestment risk premium in the valuation of British and Russian government bonds

This article studies the dynamic properties of the reinvestment risk premium in the UK and RF government bond markets. In a new interest rate environment when sovereign debt trades at a low and even negative yields and bond funds are struggling to earn sufficient returns, bond investors have become increasingly wary of reinvestment risk largely neglected previously. The reinvestment risk premium is quantified on the basis of replicating portfolios and further analyzed with respect to exposure to exogenous influence with the help of cointegration techniques. The findings are that in both markets investors recognize the significance of reinvestment risk. However, there are differences in the sensitivity of the reinvestment risk premium to exogenous indicators. In the UK government bond market investors tend to be guided by more conservative indicators but are ready to forecast in the medium-run; in the RF government bond market investors tend to be guided by less conservative indicators but are ready to forecast only in the short-run.     

Deriving value or risk? Determinants and the impact of emerging market banks’ derivative usage

This paper examines the determinants of the emerging market banks’ derivative usage and the impact of derivative usage on bank value, total risk and bank stability. Our empirical evidence first suggests that derivative usage is driven primarily by net interest margin, bank concentration and institutional strength. In addition, although derivative usage appears to reduce emerging market bank value, it does not affect total risk. Moreover, emerging market banks can reduce bank instability using derivatives. Our findings have important implications for investors and policy makers focusing on emerging derivatives markets.     

Does the Use of Foreign Currency Derivatives Affect Firms' Market Value? Evidence from Colombia

High returns in emerging markets over the last decade have attracted international investors. This study investigates if and how economic or political news affects stock market activity in two emerging markets: Argentina and Turkey. Our analysis shows that political and economic news influences both the volatility of returns and trading volume in these markets to varying degrees. Results suggest that both economic and political factors, as well as specific market characteristics, should be taken into consideration by international investors when making investment decisions in emerging markets.     

The world price of jump and volatility risk

We study international integration of markets for jump and volatility risk, using index option data for the main global markets. To explain the cross-section of expected option returns we focus on return-based multi-factor models. For each market separately, we provide evidence that volatility and jump risk are priced risk factors. There is little evidence, however, of global unconditional pricing of these risks. We show that UK and US option markets have become increasingly interrelated, and using conditional pricing models generates some evidence of international pricing. Finally, the benefits of diversifying jump and volatility risk internationally are substantial, but declining.     

信息不对称、过度自信与股价变动

信息传导的非同步和投资者情绪变化是股票市场的两个典型特征,前者会引发投资者之间出现信息不对称问题,后者主要体现为投资者过度自信,两者共同作用影响股票价格变动。本文将信息不对称和投资者过度自信情绪置于同一个分析框架,建立两阶段动态序贯定价理论模型研究现实市场上信息传导过程中股价变动的内在机制。结果表明:(1)面临新信息的进入,投资者对股票收益预期的调整与均衡价格之间具有正相关关系;(2)面临有利消息时,过度自信投资者比例越大,股票的均衡价格越高,投资收益将越低;面临不利消息时则相反;(3)随着过度自信投资者比例以及过度自信程度升高,市场风险溢价将下降;(4)投资者群体在信息传导过程中出现分化,对股价变动形成异质信念,未获取信息和获取信息但未出现过度自信的投资者认为股价被高估,获取信息且出现过度自信的投资者认为价格被低估,促使更多的交易,引发市场成交量和股价变动;(5)过度自信投资者比例与过度自信程度提高均会对市场效率产生正向影响,而对市场深度具有负向效应。最后,基于理论结果对非对称性和持续性等典型的市场波动性特征进行解释。     

市场行情影响投资者的股利偏好吗?

基于2005-2017年A股上市公司的数据,研究了在不同的市场行情中,投资者对于股利政策的偏好差别。研究发现：对于现金股利而言,在上涨和下跌的市场行情中,投资者更偏好不发放现金股利的上市公司;在平稳行情中,投资者更偏好发放现金股利的上市公司。对于股票股利而言,在上涨行情中,投资者更偏好发放股票股利的上市公司;在下跌行情中,投资者更偏好不发放股票股利的上市公司;在平稳行情中,投资者对于是否发放股票股利没有显著的偏好差异。在上涨和下跌的市场行情中,超能力派现和高送转不会改变投资者的偏好;在平稳行情中,只有正常派现和正常送转才能赢得投资者的青睐,超能力派现行为无益于上市公司,高送转还会损害公司价值。     

When do investors gamble in the stock market?

Recent studies have uncovered gambling-motivated trading activities in financial markets in which investors seek lottery-type payoffs by using financial assets. Building on prospect theory, this study provides an important complement to prior research and investigates what period that investors make gambling-motivated trading in the stock market. Examining data from the Chinese stock market, investors are revealed to have asymmetric gambling preferences in gain and loss domains. Investors' gambling motivations are more easily triggered when the market is experiencing a loss. In such periods of time, investors may preferentially opt for lottery-type stocks that offer them a small chance to earn an extreme return at the risk of a likely small loss, simply due to their ‘aversion to a sure loss’.     

Will banning naked CDS impact bond prices?

We develop a tractable partial equilibrium model to analyze the impact on the bond market generated by a ban on naked credit default swaps (CDS). We demonstrate that such a ban will have a negligible impact on the borrowing costs if CDS speculators are risk averse and take positions which are small relatively to the amount of debt outstanding. We find that the ban only excludes from the market moderately pessimistic investors, and induces the most pessimistic to implement their strategy on the short side of the bond market. Despite the sovereign debtor benefits from the reduced yields on the issued bonds, he will suffer from a diminished borrowing capacity after the ban. Such findings suggest that regulators should consider other measures to reduce instability arising from excessive speculation in derivatives markets.     

The current state of Asia-Pacific stock exchanges: A critical review of market design

This paper provides a review of the market microstructure of ten Asia-Pacific stock exchanges. Asia-Pacific stock exchanges face significant challenges in an increasingly global and competitive world equity market. These exchanges need to provide an efficient, fair and competitive trading environment if they are to attract new listings and attract investors. This paper documents significant differences in market design across Asia-Pacific stock exchanges. Many of these design features are at odds with the existing microstructure research. Achieving competitive markets may involve a review of market design and regional consolidation. Failure to increase attractiveness may result in Asia-Pacific exchanges losing market share in the global equity market. A review of current best practice in a number of critical microstructure areas is useful for market organizers to assist in policy development, is helpful for academics wishing to undertake empirical research in these markets and is a source for future research ideas.     

REVISITING MARKET EFFICIENCY: THE STOCK MARKET AS A COMPLEX ADAPTIVE SYSTEM

Well‐functioning financial markets are key to efficient resource allocation in a capitalist economy. While many managers express reservations about the accuracy of stock prices, most academics and practitioners agree that markets are efficient by some reasonable operational criterion. But if standard capital markets theory provides reasonably good predictions under “normal” circumstances, researchers have also discovered a number of “anomalies”—cases where the empirical data appear sharply at odds with the theory. Most notable are the occasional bursts of extreme stock price volatility (including the recent boom‐and‐bust cycle in the NASDAQ) and the limited success of the Capital Asset Pricing Model in accounting for the actual risk‐return behavior of stocks. This article addresses the question of how the market's efficiency arises. The central message is that managers can better understand markets as a complex adaptive system. Such systems start with a “heterogeneous” group of investors, whose interaction leads to “self‐organization” into groups with different investment styles. In contrast to market efficiency, where “marginal” investors are all assumed to be rational and well‐informed, the interaction of investors with different “decision rules” in a complex adaptive system creates a market that has properties and characteristics distinct from the individuals it comprises. For example, simulations of the behavior of complex adaptive systems suggest that, in most cases, the collective market will prove to be smarter than the average investor. But, on occasion, herding behavior by investors leads to “imbalances”—and, hence, to events like the crash of '87 and the recent plunge in the NASDAQ. In addition to its grounding in more realistic assumptions about the behavior of individual investors, the new model of complex adaptive systems offers predictions that are in some respects more consistent with empirical findings. Most important, the new model accommodates larger‐than‐normal stock price volatility (in statistician's terms, “fat‐tailed” distributions of prices) far more readily than standard efficient market theory. And to the extent that it does a better job of explaining volatility, this new model of investor behavior is likely to have implications for two key areas of corporate financial practice: risk management and investor relations. But even so, the new model leaves one of the main premises of modern finance theory largely intact–that the most reliable basis for valuing a company's stock is its discounted cash flow.     

What determines the issue price of lease asset-backed securities in China?

In this study, a unique data set is used to examine the pricing factors of lease asset-backed securities (ABS) in China's primary securitization market. In addition to conventional risk factors, such as credit enhancement, underlying asset characteristics, credit rating, and deal structure, we find that originators (i.e., leasing companies) play a critical role in determining the issuing price of lease ABS in China, as state-owned originators and high profitability lessors are more likely to receive a lower initial yield spread. We also find that non-state-owned guarantors, as a form of external credit enhancement for a tranche, can significantly broaden the issuance spread, which is opposite to the situation in mature securitization markets. In addition, lease ABS investors in China may underestimate the risks posed by the diversification level of the asset pool of lease ABS, and reputable underwriters can help the product earn a lower yield spread in the primary market. Our findings indicate some similarities between the pricing factors in China's lease ABS market and those in mature securitization markets, although they still have their own unique features.     

我国股票市场“聪明投资者”投资绩效归因研究

不同于寻找具有超额收益“证券”的股票市场主流投资方法,根据历史投资绩效来“选人”,即寻找“聪明投资者”可为构建有效的投资策略提供新思路。本文利用我国投资者全账户交易信息,根据历史投资绩效界定“聪明投资者”,并探索其获得超额收益的原因。结果显示,我国股票市场存在“聪明投资者”,在牛熊市中均可获得显著的超额收益;相比其他投资者,“聪明投资者”风险偏好较低但能获得超额收益,即不是因为他们高杠杆融资和配置更多风险资产承担风险而获得风险溢价,而是因为这类投资者具有更好的仓位管理能力、市场风格适应能力及显著的选股能力。本研究拓展了对我国这一部分特殊群体投资者行为的探索,结论可以用于构建具有实践意义的投资策略。     

On equilibrium asset price processes

In this article we derive necessary and sufficient conditionsthat must be satisfied by equilibrium asset price processesin a pure exchange economy. We examine a world in which assetprices follow a diffusion process, asset markets are dynamicallycomplete, all investors maximize their (state-independent) expectedutility of consumption at some future date, and investors havenonrandom exogenous income. We show that it is necessary andsufficient that the coefficients of an equilibrium diffusionprice process satisfy a partial differential equation and aboundary condition. We also examine how the dynamics of assetprices are related to the shape of the representative investor'sutility function through the boundary condition. For example,in a constant-volatility economy, the expected instantaneousreturn of the market portfolio is mean reverting if and onlyif the relative risk aversion of the representative investoris decreasing in terminal wealth.     

中国股市反应偏差的投资者心态模型

在行为金融学理论中,投资者心态模型将投资者的心理偏差当作反应偏差的源泉,但这些投资者心态模型对于发展时间较短、具有区别于成熟市场的独特市场制度和社会环境的中国股票市场而言,存在适用度问题。分析中国股票市场投资者普遍的投机心理等要素,运用改进了的HS模型,根据股票市场的习惯,分别对一个牛市周期和熊市周期进行验证得出,投机心理支配下的机构投资者和个人投资者的相互作用是导致反应偏差的主要原因。