Distribution of occupation times for constant elasticity of variance diffusion and the pricing of α-quantile options

The main results of this paper are the derivation of the distribution functions of occupation times under the constant elasticity of variance process. The distribution functions can then be used to price α-quantile options. We also derive the fixed-floating symmetry relation for α-quantile options when the underlying asset price process follows a geometric Brownian motion.     

A transform approach to compute prices and Greeks of barrier options driven by a class of Lévy processes

In this paper we propose a transform method to compute the prices and Greeks of barrier options driven by a class of Lévy processes. We derive analytical expressions for the Laplace transforms in time of the prices and sensitivities of single barrier options in an exponential Lévy model with hyper-exponential jumps. Inversion of these single Laplace transforms yields rapid, accurate results. These results are employed to construct an approximation of the prices and sensitivities of barrier options in exponential generalized hyper-exponential Lévy models. The latter class includes many of the Lévy models employed in quantitative finance such as the variance gamma (VG), KoBoL, generalized hyperbolic, and the normal inverse Gaussian (NIG) models. Convergence of the approximating prices and sensitivities is proved. To provide a numerical illustration, this transform approach is compared with Monte Carlo simulation in cases where the driving process is a VG and a NIG Lévy process. Parameters are calibrated to Stoxx50E call options.     

Pricing the Chicago Board of Trade T-Bond futures

The aim of this paper is to investigate the pricing of the Chicago Board of Trade (CBOT) Treasury-Bond futures. The difficulty in pricing it arises from its multiple inter-dependent embedded delivery options, which can be exercised at various times and dates during the delivery month. We consider a general Markov diffusion process model for stochastic interest rates and propose a pricing algorithm that can handle all the delivery rules embedded in the CBOT T-Bond futures. Our procedure combines dynamic programming, finite-elements approximation, and fixed-point evaluation. Numerical illustrations are provided under the one-factor Vasicek and Cox–Ingesoll–Ross models, and under the time in-homogeneous Hull–White model.     

Valuing Fixed-Income Options and Mortgage-Backed Securities with Alternative Term Structure Models

To value mortgage-backed securities and options on fixed-income securities, it is necessary to make assumptions regarding the term structure of interest rates. We assume that the multi-factor fixed parameter term structure model accurately represents the actual term structure of interest rates, and that the values of mortgage-backed securities and discount bond options derived from such a term structure model are correct. Differences in the prices of interest rate derivative securities based on single-factor term structure models are therefore due to pricing bias resulting from the term structure model. The price biases that result from the use of single-factor models are compared and attributed to differences in the underlying models and implications for the selection of alternative term structure models are considered.     

Keeping Up with the Joneses: A Model and a Test of Collective Accounting Fraud

This paper explains the variations in incidence of accounting fraud across economic settings by putting the behaviour and motivation of managers under the microscope. To safeguard their reputation in the managerial labour market, managers of firms that perform poorly are prone to fraudulently inflate earnings if they expect the economy to be strong, since that raises the likelihood of peers reporting high performance. A realised level of economic activity, on the other hand, counteracts this tendency on the part of managers to overstate earnings, by reducing the number of firms that actually perform poorly. We term these two effects the incentive effect and the need effect, respectively. The two effects yield a distinctive relationship between the incidence of accounting fraud and macroeconomic conditions. Specifically, the fraction of firms fraudulently over-reporting earnings is positively related to expected economic performance and negatively related to realised economic performance.
The incentive and need effects on collective fraud are examined empirically by relating proxies of the aggregate incidence of accounting fraud to expected and realised GDP growth rates. The results unambiguously support the predicted influence of macroeconomic performance.     

美国高校法务会计教育现状考察

法务会计提供的调查与诉讼服务构成对传统审计的重要补充。为了培养合格的法务会计人才,美国高校法务会计教育已从单一课程设置向学历与学位教育等多类型系统范式演进。西弗吉尼亚大学主持的全美欺诈与法务会计课程标准化运动积累了丰富经验,可为法务会计高等教育的发展提供借鉴。     

国家审计风险模型构建及其应用研究

审计风险模型是指导审计人员开展审计工作的理论分析出发点。国家审计风险与社会审计风险存在实质性差异。国家审计风险具有风险评估外在压力不足、经济业务活动微观查处责任等特征。从舞弊动因出发,国家审计风险由错误风险、舞弊风险和检查风险构成。应用国家审计风险模型,审计人员应在分析建设项目参与各方舞弊可能性的基础上,从审计成本、审计效率的综合角度考虑确定跟踪审计的介入时间。     

基于博弈视角的证券市场监管方式改进研究

监管行为和违规行为是证券市场中的一对矛盾体,两者互相博弈。本文通过建立证券市场中监管行为与违规行为的博弈模型,分别得出纯策略纳什均衡和混合策略纳什均衡。结果表明:均衡点与监管成本、违规行为处罚力度和违规收益等因素有关。最后提出了规范我国证券市场发展的若干政策建议。     

证券公司风险监管制度有效性的实证研究

按照国际清算银行(BIS)颁布的新资本充足率规范,以49个中国证券公司实际自营投资组合为样本、采用基于VaR的内部模型法,估算各证券公司自营投资的市场风险和应计提资本,并以之检验中国证券公司新老资本监管制度的有效性.实证结果显示:改革后的2006版资本监管制度比老制度有所改善,但对风险的反映不如内部模型法准确,中国监管制度改革的方向应是采用内部模型法.因主要品种风险调整比例设置偏低,新制度平均低估证券公司自营风险29%,建议监管规则调整上海180指数股票、ST类股票、基金、企业债、可转债等品种的风险调整比例.     

Effect of personality on fraud detection： The Malaysian case

Auditing standards require external auditors to provide reasonable assurance that the financial statements are free from material misstatements, either due to fraud or error. Inability of the external auditors to detect the material misstatements, particularly fraud, may expose them to litigation. The present study aims to examine the effect of personality factors （i.e., neuroticism, extraversion, conscientiousness, openness to experience and agreeableness） on the external auditors＇ ability to detect the likelihood of fraud. An experimental approach is adopted by sending case materials to audit partners and audit managers attached to auditing firms operating in Malaysia. The result shows that personality does not have a positive effect on the external auditors＇ ability to detect the likelihood of fraud.