自由现金流、公司治理与财务性投资——基于2011-2013年A股上市公司的实证研究

本文基于预期效用和控股权利益理论,运用数理分析方法,通过构造公司价值的V-N-M效用函数,对影响我国上市公司财务性投资行为的因素及其机理进行分析,并以2008-2011年沪深两市A股上市公司为样本进行实证检验。研究发现:(1)公司自由现金流越多,越有可能进行财务性投资;(2)在自由现金流一定条件下,资产负债率越高,上市公司越不可能进行财务性投资;(3)控股股东持股比例与财务性投资存在倒U型的关系。     

On optimal proportional reinsurance and investment in a Markovian regime-switching economy

In this paper, the surplus of an insurance company is modeled by a Markovian regimeswitching diffusion process. The insurer decides the proportional reinsurance and investment so as to increase revenue. The regime-switching economy consists of a fixed interest security and several risky shares. The optimal proportional reinsurance and investment strategies with no short-selling constraints for maximizing an exponential utility on terminal wealth are obtained.     

民间金融“救赎”小微

30多年的改革开放,使得我国民营经济取得了快速发展。目前,我国民营经济总最已经占到了整个国民经济总量的一半以上,其中小微企业数最更是占到80％以上。但由于机制的不完善,民间资本投资难,中小微型企业融资难的尴尬情况也伴随着我国的改革开放进程日渐显现。     

数字

25%保监会8月11日发布的《关于调整保险资金投资政策有关问题的通知》明确,在上季末总资产20％的比例内．险资可自主投资股票和股票型基金;险资投资基金的余额为不超过该保险公司上季末总资产的15％,投资基金和股票的余额合计不超过该保险公司上季末总资产的25％。此外,通知还放宽了险资境外投资范围,首次提出保险公司可以投资境外资本市场公开发行的证券投资基金。     

Optimal proportional reinsurance and investment problem with jump-diffusion risk process under effect of inside information

We study optimal investment and proportional reinsurance strategy in the presence of inside information. The risk process is assumed to follow a compound Poisson process perturbed by a standard Brownian motion. The insurer is allowed to invest in a risk-free asset and a risky asset as well as to purchase proportional reinsurance. In addition, it has some extra information available from the beginning of the trading interval, thus introducing in this way inside information aspects to our model. We consider two optimization problems： the problem of maximizing the expected exponential utility of terminal wealth with and without inside information, respectively. By solving the corresponding Hamilton-Jacobi-Bellman equations, explicit expressions for their optimal value functions and the corresponding optimal strategies are obtained. Finally, we discuss the effects of parameters on the optimal strategy and the effect of the inside information by numerical simulations.