Managerial Ownership and Corporate Hedging

Abstract:  Using information on 443 UK non-financial companies, this work provides evidence supporting the hypothesis that managerial risk aversion is an incentive to deviate from the optimal hedging position. Conflicts of interest between shareholders and managers are at the centre of the decision about the firm's risk profile but are not relevant as determinants of the decision to hedge. This is rather associated with factors enhancing the firm's expected value (underinvestment, scale economies, tax savings).     

Methods of Partial Hedging

In this article we survey methods of dealing with the following problem: A financial agent is trying to hedge a claim C, without having enough initial capital to perform a perfect (super) replication. In particular, we describe results for minimizing the expected loss of hedging the claim C both in complete and incomplete continuous-time financial market models, and for maximizing the probability of perfect hedge in complete markets and markets with partial information. In these cases, the optimal strategy is in the form of a binary option on C, depending on the Radon-Nikodym derivative of the equivalent martingale measure which is optimal for a corresponding dual problem. We also present results on dynamic measures for the risk associated with the liability C, defined as the supremum over different scenarios of the minimal expected loss of hedging C. This revised version was published online in August 2006 with corrections to the Cover Date.     

Behavioral currency hedging for international portfolios

The purpose of this paper is to incorporate behavioral issues as it relates to the active currency hedging of international portfolios in the context of traditional expected utility maximization approach. The uniqueness of the approach is that separate risk aversion parameters are introduced for asset and currency markets. The paper is similar in spirit to Black (Black, F. 1989, Universal hedging, Financial Analysts Journal (July-August), 16-22.), who argued that a portion of foreign equity investments should be permanently unhedged, which is basically postulating that one should take a buy-and-hold position in currency with a fraction of the capital. The behavioral twist included in the traditional expected utility maximization approach results in lower hedge ratios, ceteris paribus, partly due to the asymmetric nature of the compensation structure of currency managers.Since the asymmetric nature of incentive schemes of asset and currency managers dictates how one optimizes the investment portfolio of a pension or endowment fund, the unusual behavior of a given institutional fund manager should not be called “irrational,” only because the optimal currency hedging level deviates from the one derived under rational expectations. This only justifies the use of different hedging strategies by various institutional investors. We describe in detail how the level of hedging should be revised downwards because of behavioral factors. Conclusions are in the context of what people would predict to see in the market, if certain investors behave in an “irrational” way.     

贷款损失准备计提与商业银行经营风险相关性研究 ——基于经理自主权视角

贷款损失准备的计提作为商业银行调节会计利润的手段,是否对商业银行经营风险有影响,是一个值得探讨的问题。基于我国上市商业银行2007-2017年的数据为研究样本进行实证分析,研究结果表明：贷款损失准备对商业银行经营风险有正向信号传递作用。其中,基于经理自主权计提的自由裁量部分能缓释经营风险,非自由裁量部分对经营风险产生加速放大效应,从而证明了自由裁量贷款损失准备能增强银行风险承担能力,为商业银行经理人员和监管者合理规范计提准备金提供新思路。     

Arbitrage, Risk Premium, and Cointegration Tests of the Efficiency of Futures Markets

This article provides a new perspective on the efficiency of futures markets in a cointegration framework. Under the conventional risk premium hypothesis, if futures and spot prices are non-stationary, they must be cointegrated if futures markets are efficient. Alternatively, the cost-of-carry model implies that there should be a cointegration relationship among spot prices, futures prices and interest rates assuming all the series contain a unit root. Market efficiency further implies specific parameter restrictions under these two models. Using data on the futures markets for gold, silver, palladium and platinum, this article first establishes that interest rates, spot and futures prices are unit root non-stationary. The evidence on cointegration is somewhat mixed: the gold futures market is consistent with the cost-of-carry model, and the silver futures market satisfies the risk premium hypothesis, but the evidence for the other two markets is inconclusive.     

Pawns and queens revisited: public provision of private goods when individuals make mistakes

This paper analyses the optimal tax policy and public provision of private goods when the government is paternalistic and has a redistributive objective. When individuals only differ with respect to their income-earning abilities, the publicly-provided goods should be overprovided, relative to the decentralised optimum, if society’s marginal valuation of them exceeds the individual valuation and if these goods are complements to labour supply. However, when the individuals also differ in terms of their valuation of the publicly-provided good, this simple conclusion does not hold. Optimal marginal income tax rates are shown to differ from the standard rules if publicly-provided goods and labour supply are related.      

The Property Tax as a Tax on Value: Deadweight Loss

Consider an atomistic developer who decides when and at what density to develop his land, under a property value tax system characterized by three time-invariant tax rates: τ_V, the tax rate on pre-development land value; τ_S, the tax rate on post-development residual site value; and τ_K, the tax rate on structure value. Arnott (2005) identified the subset of property value tax systems that are neutral. This paper investigates the relative efficiency of four idealized, non-neutral property value tax systems [(i) “Canadian' property tax system: τ_V = 0, τ _S = τ_K; (ii) simple property tax system: τ_V = τ _S = τ_K; (iii) residual site value tax system: τ_K = 0,τ _V = τ_S; (iv) two-rate property tax system: τ_V = τ _S > τ_K > 0] under the assumption of a constant rental growth rate. JEL Code: H2     

More on Properness: The Case of Mean-Variance Preferences

This paper focuses on the situations where individuals with mean-variance preferences add independent risks to an already risky situation. Pratt and Zeckhauser (Econometrica, 55, 143–154, 1987) define a concept called proper risk aversion in the expected utility framework to describe the situation where an undesirable risk can never be made desirable by the presence of an independent undesirable risk. The assumption of mean-variance preferences allows us to study proper risk aversion in an intuitive manner. The paper presents an economic interpretation for the quasi-concavity of a utility function derived over mean and variance. The main result of the paper says that quasi-concavity plus decreasing risk aversion is equivalent to proper risk aversion.     

Disappointment aversion and the equity premium puzzle: new international evidence

Drawing upon the seminal study of Ang, Bekaert, and Liu [2005. “Why Stock May Disappoint?” Journal of Financial Economics 76 (3): 471–508], we incorporate disappointment aversion (DA, that is, aversion to outcomes that are worse than prior expectations) within a simple theoretical portfolio-choice model. Based on the results of this model, we then empirically address the portfolio allocation problem of an investor who chooses between a risky and a risk-free asset using international data from 19 countries. Our findings strongly support the view that DA leads investors to reduce their exposure to the stock market (i.e. DA significantly depresses the portfolio weights on equities in all cases considered). Overall, our study shows that in addition to risk aversion, DA plays an important role in explaining the equity premium puzzle around the world.     

备兑权证风险对冲策略分析

我国资本市场金融创新产品接连推出,备兑权证也再次被提上议程。在备兑权证的风险管理上,现有文献多集中于权证定价模型上的Delta对冲策略,却忽视了交易成本与间断交易,也没有深入分析影响该策略的各个因素。本文通过仿真实验Leland模型下的动态Delta对冲策略,发现交易成本、对冲间隔、行权价格以及波动率的变化都会显著影响对冲结果,但发行商仍有机会获取对冲收益,建议发行商略微溢价（5％）发行备兑权证,认为第三方对冲监管和差别对待的机制设计可确保市场繁荣。     

风险厌恶、失望厌恶和期货套期保值

本文考察失望厌恶对期货套期保值的影响。我们把一个不变的绝对风险厌恶（CARA）效用函数放进Gul（1991）的失望厌恶框架之内。它显示出，一个更厌恶失望的套期保值者会比一个厌恶失望程度较低的套期保值者选择一个更接近于最小方差套期保值的最优期货头寸。当套期保值者厌恶风险的程度较低时，失望厌恶的效应更强。对失望很小程度的厌恶会使一个接近于风险中性的套期保值者持有一个截然不同的头寸。此外，一个更厌恶风险或失望的套期保值者会有一个较低的参考点reference point。数字上的结果显示，厌恶失望的套期保值者的参考点往往会低于传统的厌恶损失的套期保值者的参考点。于是，厌恶失望的套期保值者的行动会更加保守，利用机会牟利的行为会少于传统的厌恶损失的套期保值者。