Enforcement of Optimal Disclosure Rules in the Presence of Moral Hazard

Abstract

This paper analyzes the role of disclosure enforcement mechanisms (such as SEC enforcement teams and corporate governance systems) in directing the disclosure practices of managers when the information is used by shareholders to monitor the manager. The paper establishes a role for a disclosure enforcement system by showing that in its absence it is impossible to simultaneously induce a manager to adopt the desirable disclosure strategy and use the disclosure efficiently to monitor him. The paper shows how the effectiveness of the disclosure enforcement system and the cost of disclosure influence (i) the economic viability of the disclosure enforcement system, (ii) the disclosure policy of the manager, and (iii) the value of including stock options in the manager's compensation package.     

Risk management of climate impact for tourism operators: An empirical analysis on ski resorts

The aim of this paper is to analyze the performance of hedging strategies based on snow and temperature options developed by ski operators to protect their profitability under adverse changes in climatic conditions. The setup is based on a joint non-parametric model for snow and temperature aimed at providing a modelling support for the assessment of the impact of these weather variables on the number of visitors at the ski resort. The analysis is carried out considering the case of Austrian Alps, and examines: i) the ability of the proposed approach to provide a realistic representation of the true data-generating process; ii) the variability reduction in the Profit and Loss of the ski operator offered by the suggested strategies; and iii) the tradeoff between the budget earmarked for hedging and profitability protection.     

The values and incentive effects of options on the maximum or the minimum of the stock prices and market index

In this study, we employ the certainty equivalent principle to investigate cost efficiency and incentives of the options on the maximum or the minimum of the stock prices and market index levels. In addition, the options with averaging features are also considered. Numerical results show that options on the maximum are more cost efficient and incentive-efficient than traditional ones. As for options on the minimum, they are more cost efficient than traditional ones only when the weight in the options is not very large. However, options on the minimum also provide stronger incentives to increase stock prices than traditional ones.     

The option to stock volume ratio and future returns

We examine the information content of option and equity volumes when trade direction is unobserved. In a multimarket asymmetric information model, equity short-sale costs result in a negative relation between relative option volume and future firm value. In our empirical tests, firms in the lowest decile of the option to stock volume ratio (O/S) outperform the highest decile by 0.34% per week (19.3% annualized). Our model and empirics both indicate that O/S is a stronger signal when short-sale costs are high or option leverage is low. O/S also predicts future firm-specific earnings news, consistent with O/S reflecting private information.     

Exact solutions for bond and option prices with systematic jump risk

A variety of realistic economic considerations make jump-diffusion models of interest rate dynamics an appealing modeling choice to price interest-rate contingent claims. However, exact closed-form solutions for bond prices when interest rates follow a mixed jump-diffusion process have proved very hard to derive. This paper puts forward two new models of interest-rate dynamics that combine infrequent, discrete changes in the interest-rate level, modeled as a jump process, with short-lived, mean reverting shocks, modeled as a diffusion process. The two models differ in the way jumps affect the central tendency of interest rates; in one case shocks are temporary, in the other shocks are permanent. We derive exact closed-form solutions for the price of a discount bond and computationally tractable schemes to price bond options.     

Information flow between the stock and option markets: Where do informed traders trade?

This paper investigates the flow of information between the equity and options markets. We argue that informed traders, in deciding where to place their trades, are not entirely indifferent to option moneyness, degree of information asymmetry, and option liquidity. Unlike some previous studies that find information to flow unilaterally from equity to options markets, we control for the above factors and discover feedback relations between trades in out-of-the-money (OTM) options and the underlying equities. The finding is consistent with the pooling equilibrium hypothesis, which asserts that informed traders trade in both the equity and options markets. Some informed traders are probably attracted to the out-of-the money options because of their higher liquidity, lower premiums, and higher delta-to-premium ratios, hence, lending support to the liquidity and leverage hypothesis.     

American stochastic volatility call option pricing: A lattice based approach

This study presents a new method of pricing options on assets with stochastic volatility that is lattice based, and can easily accommodate early exercise for American options. Unlike traditional lattice methods, recombination is not a problem in the new model, and it is easily adapted to alternative volatility processes. Approximations are developed for European C.E.V. calls and American stochastic volatility calls. The application of the pricing model to exchange traded calls is also illustrated using a sample of market prices. Modifying the model to price American puts is straightforward, and the approach can easily be extended to other non-recombining lattices.     

Density estimation through quasi-analytic Monte-Carlo simulation: Options arbitrage with transactions costs

Discretely rebalanced options arbitrage strategies in the presence of transaction costs have path dependent returns that are difficult to model analytically. I instead use a quasi-analytic procedure that combines the computational efficiency of analytical solutions with the flexibility of simulations. The central feature is the estimation of the distribution of returns of the arbitrage strategy by mapping simulated returns percentiles and the input parameter set. Using the estimated density, I evaluate the tradeoff between transaction costs and risk exposure under generalized transaction costs structures that includes bid-ask spread and brokerage commission. I show that the optimal strategy depends on transaction costs, volatility, and option moneyness. Strategies such as rebalancing when the hedge ratio changes by 0.25, balances transaction costs and risk exposure, and can be optimal.

衍生金融工具及其对会计的影响

经济环境的变化必然引起会计的变化 ,衍生金融工具的出现和发展为会计提出了新的研究课题。衍生金融资产与衍生金融负债与传统会计资产和负债的相比有许多不同之处 ,对衍生金融工具对会计有关要素的定义、确认、计量和报告等方面的影响的探讨研究 ,有助于科学地解决会计实务中的问题。