加强高校科研经费财务监管工作对策探析

高校科研经费管理是科研工作持续健康发展的重要保障,财务监管工作是科研经费管理的重要组成部分。针对高校科研经费财务监管工作中存在的薄弱环节,文章从分析高校科研经费管理和使用中存在的问题及其危害性入手,探求原因,提出加强高校科研经费财务监管工作的对策。     

Price Clustering in Individual Equity Options: Moneyness,Maturity, and Price Level

Equity options have a significant influence on the price discovery process. This study presents unique evidence of substantial price clustering in individual equity options contracts. A particular contribution arises from investigating competing hypotheses on the roles of moneyness and maturity as determinants of option price clustering. We assert that options price clustering can be decomposed to price level, moneyness, and maturity effects. After controlling for other factors, price clustering has an inverse relation with time‐to‐maturity. This supports the negotiation hypothesis, but not the price resolution hypothesis. Price clustering also tends to be inversely related to moneyness. This effect is linked to the intrinsic value component of option price. Both the maturity and moneyness effects act in an opposite direction to what would be anticipated on the basis of price level alone; hence, these two effects are identified as additional influences on option price clustering. It is also found that the designated market maker scheme at NYSE Euronext London International Financial Futures Exchange (LIFFE) has little influence on trade price clustering. © 2012 Wiley Periodicals, Inc. Jrl Fut Mark 33:55–76, 2013     

ALTERNATIVE CHARACTERIZATIONS OF AMERICAN PUT OPTIONS

We derive alternative representations of the McKean equation for the value of the American put option. Our main result decomposes the value of an American put option into the corresponding European put price and the early exercise premium. We then represent the European put price in a new manner. This representation allows us to alternatively decompose the price of an American put option into its intrinsic value and time value, and to demonstrate the equivalence of our results to the McKean equation.     

Convergence of the Critical Price In the Approximation of American Options

We consider the American put option in the Black-Scholes model. When the value of the option is computed through numerical methods (such as the binomial method and the finite difference method) the approximation yields an approximate critical price. We prove the convergence of this approximate critical price towards the exact critical price.     

Digital Security Tokens and Their Derivatives

Digital objects in network commerce cause new credit risks (e.g., by an unpredictable certificate revocation). Financial theories can be used to estimate these risks but theories firstly need models. This paper models the objects as security token (setok). Each setok has its price, values, timestamp, and contents. Not only the price but also the values can be uncertain and cause risks. In order to hedge such risks, an option written on the value is introduced and priced. The pricing can be used to estimate parameters which describe the uncertainty. Discussions include how systematic the revocation risk is.     

股票期权:基于人力资本产权的分析

本文认为,企业是一个由人力资本和非人力资本共同订立的特别市场合约,企业家根据其人力资本分享企业剩余,人力资本在产权上永远具有独特性,其产权要求是保证其使用过程中的排他性。文章提出,提高人力资本开发和使用经济效率的唯一有效的途径是满足人力资本的报酬要求,实行充分的激励制度,保证人力资本的全部价值实现。股票期权是公司给股票期权受权人按约定价格和数量在约定时间购买股票的权利,既可避免直接定价的市场效果,又能实现企业家的利益回报,有利于人力资本正态效应的发挥,尽可能地将企业家所创造的收益与其所得保持比较高的正相关关系,在一定程度上是对人力资本参与分配的一种肯定,是对企业家索取剩余权利的承认,是一种人力资本的有效激励方式。     

基金管理公司经营层持基激励的选择与完善

基金制度下基金管理公司的经营层拥有更多的基金与公司经营的控制权,迫切需要通过长期激励将其利益与基金、公司的发展相互结合,以实现彼此的共同发展。基金管理公司股权激励在具体的制度选择上面临着诸多问题和障碍,而持基激励则在符合法律规定、满足制度目标与现状等方面具有积极的价值,因而应当成为其长期激励机制构建的必然选择。由于现有的基金管理公司经营层持基激励尚存在着相应的不足,应当在持基时间、数额、对象以及立法等方面加以相应的完善。     

Do hedge funds time market tail risk? Evidence from option-implied tail risk

This paper focuses on an unexplored dimension of fund managers’ timing ability: Market-wide tail risk implied by information in options markets. Constructing the option-implied tail risk, we investigate whether hedge fund managers can strategically time the tail risk through adjusting their exposure to changes of it. Using an extensive sample of equity-oriented hedge funds, we find strong evidence of tail risk timing ability of hedge fund managers. Furthermore, tail risk timing ability brings significant economic value to investors. Top-ranked funds outperform bottom-ranked funds by 5–7% annually after adjusting for risk factors. Our results are robust to various robustness checks.     

OPTIMAL SHOUTING POLICIES OF OPTIONS WITH STRIKE RESET RIGHT

The reset right embedded in an option contract is the privilege given to the option holder to reset certain terms in the contract according to specified rules at the moment of shouting, where the time to shout is chosen optimally by the holder. For example, a shout option with strike reset right entitles its holder to choose the time to take ownership of an at-the-money option. This paper develops the theoretical framework of analyzing the optimal shouting policies to be adopted by the holder of an option with reset right on the strike price. It is observed that the optimal shouting policy depends on the time dependent behaviors of the expected discounted value of the at-the-money option received upon shouting. During the time period when the theta of the expected discounted value of the new option received is positive, it is never optimal for the holder to shout at any level of asset value. At those times when the theta is negative, we show that there exists a threshold value for the asset price above which the holder of a reset put option should shout optimally. For the shout floor, we obtain an analytic representation of the price function. For the reset put option, we derive the integral representation of the shouting right premium and analyze the asymptotic behaviors of the optimal shouting boundaries at time close to expiry and infinite time from expiry. We also provide numerical results for the option values and shouting boundaries using the binomial scheme and recursive integration method. Accuracy and run time efficiency of these two numerical schemes are compared.     

中国股票期权激励的有效性分析

从理论上讲，股票期权是一种很完美的激励管理方式。然而，在我国上市公司中目前已有超过30家企业宣布停止股权激励计划。究其原因，是国家处于对股权激励机制负面效应的考虑：股价与企业价值分离、经理人市场弱有效性、税法不完善等。从股票期权激励利弊及正反效应分析看，中国可借鉴美国的做法，加快完善资本市场，有效设计合理的股票期权激励方案；实现经理人竞争上岗；分类制定税收政策；将股票期权划分为激励型和非激励型，对激励型股票期权实行更为优惠的税收政策。     

CRITICAL PRICE NEAR MATURITY FOR AN AMERICAN OPTION ON A DIVIDEND-PAYING STOCK IN A LOCAL VOLATILITY MODEL

We consider an American put option on a dividend-paying stock whose volatility is a function of the stock value. Near the maturity of this option, an expansion of the critical stock price is given. If the stock dividend rate is greater than the market interest rate, the payoff function is smooth near the limit of the critical price. We deduce an expansion of the critical price near maturity from an expansion of the value function of an optimal stopping problem. It turns out that the behavior of the critical price is parabolic. In the other case, we are in a less regular situation and an extra logarithmic factor appears. To prove this result, we show that the American and European critical prices have the same first-order behavior near maturity. Finally, in order to get an expansion of the European critical price, we use a parity formula for exchanging the strike price and the spot price in the value functions of European puts.     

Semistatic hedging and pricing American floating strike lookback options

We price an American floating strike lookback option under the Black–Scholes model with a hypothetic static hedging portfolio (HSHP) composed of nontradable European options. Our approach is more efficient than the tree methods because recalculating the option prices is much quicker. Applying put–call duality to an HSHP yields a tradable semistatic hedging portfolio (SSHP). Numerical results indicate that an SSHP has better hedging performance than a delta-hedged portfolio. Finally, we investigate the model risk for SSHP under a stochastic volatility assumption and find that the model risk is related to the correlation between asset price and volatility.     

Gold price risk and the returns on gold mutual funds

A model is presented for estimating the theoretical gold price elasticity of the value of mutual funds investing in gold mining companies. The theoretical elasticity shows that if the funds invest in companies whose assets are comprised primarily of operating gold mines, then the return of an investment in the fund will be at least as great as an investment in gold (i.e., the gold price elasticity of the gold fund is greater than 1). Empirical tests of the above propositions are presented. Empirical tests also show, however, that the gold mutual funds contain a substantial amount of risk which is not explained either by market risk or gold price risk. Accordingly, gold mutual funds and gold bullion do not bring identical risks to an investor's portfolio.     

CRITICAL STOCK PRICE NEAR EXPIRATION

We study the critical price of an American put option near expiration in the Black-Scholes model. Our main result is an estimate for the difference ( t )- K between the critical price at time t and the exercise price as t approaches the maturity of the option.     

Who should practice price discrimination using rebates in an asymmetric duopoly?

Price discrimination is generally thought to improve firm profits by allowing firms to extract more consumer surplus. In competition, however, price discrimination may also be costly to the firm because restrictive incentive compatibility conditions may allow the competing firm to gain market share at the discriminating firm’s expense. Therefore, with asymmetric competition, it may be the case that one firm would let the other firm assume the burden of price discrimination. We investigate optimal segmentation in a market with two asymmetric firms and two heterogeneous consumer segments that differ in the importance of price and product attributes. In particular, we investigate second-degree price discrimination under competition with explicit incentive compatibility constraints thus extending prior work in marketing and economics. Focusing on the managerial implications, we explore whether it would be profitable for either or both firms to pursue a segmentation strategy using rebates as a mechanism. We identify conditions under which one or both firms would want to pursue such segmentation. We find that segmentation lessens competition for the less price-sensitive consumer segment and that this results in higher profits to both firms. A key to understanding this result is that segmentation leads to consumer remixing. We establish the key result that if firms are asymmetric in their attractiveness to consumers, the disadvantaged firm in our model is more likely to pursue a segmentation strategy than its rival in equilibrium. We then ask whether this result prevails in practice. To this end, we explore competitive segmentation empirically and are able to verify that disadvantaged firms indeed pursue segmentation through rebates with greater likelihood.     

Attitudes Towards Risk: An Experiment

The evaluations of a repeated lottery with and without the option to sell the second–stage lottery are compared theoretically and experimentally. Comparing individuals’ risk attitudes, we find that risk attitudes differ depending on the measure of risk attitude applied. We also find that subjects show low or no risk aversion, but put very high value on the opportunity to sell the lottery in the second stage of the decision problem. These findings cast doubts on the suitability of the random price mechanism for truthful revelation of willingness to pay in sequential decision problems.     

Randomized Stopping Times and American Option Pricing with Transaction Costs

In a general discrete-time market model with proportional transaction costs, we derive new expectation representations of the range of arbitrage-free prices of an arbitrary American option. The upper bound of this range is called the upper hedging price, and is the smallest initial wealth needed to construct a self-financing portfolio whose value dominates the option payoff at all times. A surprising feature of our upper hedging price representation is that it requires the use of randomized stopping times (Baxter and Chacon 1977), just as ordinary stopping times are needed in the absence of transaction costs. We also represent the upper hedging price as the optimum value of a variety of optimization problems. Additionally, we show a two-player game where at Nash equilibrium the value to both players is the upper hedging price, and one of the players must in general choose a mixture of stopping times. We derive similar representations for the lower hedging price as well. Our results make use of strong duality in linear programming.     

AN ANALYTICAL SOLUTION FOR THE TWO‐SIDED PARISIAN STOPPING TIME,ITS ASYMPTOTICS,AND THE PRICING OF PARISIAN OPTIONS

In this paper, we obtain a recursive formula for the density of the two‐sided Parisian stopping time. This formula does not require any numerical inversion of Laplace transforms, and is similar to the formula obtained for the one‐sided Parisian stopping time derived in Dassios and Lim. However, when we study the tails of the two distributions, we find that the two‐sided stopping time has an exponential tail, while the one‐sided stopping time has a heavier tail. We derive an asymptotic result for the tail of the two‐sided stopping time distribution and propose an alternative method of approximating the price of the two‐sided Parisian option.     

On the exit value of a forward contract

Default risk associated with forward contracts can be substantial, yet these financial instruments are widely used to hedge price risk. An objectively priced exit option on the forward contract would help reduce the likelihood of litigation associated with contract default. A method is proposed to compute the exit option's value for an arbitrary forward contract, using Black's (1976) model and option premium data. The time series dynamics of the exit option value are confirmed to be, like its underlying, well described by a martingale with heavy‐tailed (Student) GARCH residuals. © 2008 Wiley Periodicals, Inc. Jrl Fut Mark 29: 179–196, 2009     

Option happiness and liquidity: Is the dynamics of the volatility smirk affected by relative option liquidity?

This study investigates the dynamic relationship between option happiness (the steepness of the volatility smirk) and relative index option liquidity. We find that, on a daily basis, option happiness is significantly dependent on the relative liquidity between option series with different moneyness. In particular, deterioration (improvement) in liquidity of an out‐of‐the‐money put option relative to a concurrent at‐the‐money call option would lead to higher (lower) option happiness. This relationship is robust to relative option liquidity measures based on bid–ask spreads, option price impacts, and option order book imbalances. The results also show a significant maturity effect in option happiness, consistent with the notion that options are “dying smiling.” © 2011 Wiley Periodicals, Inc. Jrl Fut Mark