BOT项目中选择投标方的新方法

作为一种新型的投资方式,BOT模式在我国已被广泛运用。由于BOT项目的投资回收完全依靠投资期内销售收入,那么,政府如何选择投标方,将成为BOT项目是否成功地关键。通过对BOT项目中传统计算净现值的方法和CAPM模型方法的分析和比较,发现这两种方法在BOT项目中的不足。使用了新的方法弥补了传统计算净现值的方法和CAPM模型方法的不足,从而能够更加科学地保证BOT项目的实施,并对其它融资方式招标或议标过程中的投标方选择提供了新方法。     

中国上市公司A股和H股价差的实证研究

本文从实证角度,详细描述了截止2007年12月31日51家AH股上市公司自上市以来的价差变化趋势,并从公司、市场、利率、投资者、重大政策多个角度深入分析了AH股价差的影响因素。实证结果表明:同一上市公司的A股对H股普遍存在溢价现象,并且AH股价差在考察区间呈先上升后下降的趋势;流动性假说和信息不对称假说对AH股价差具有较强的解释力;两地的市场波动及利率变化对AH股价差具有显著的影响,而投资者结构和公司治理结构对AH股价差的作用不显著;在控制了市场波动等因素的影响之后,股权分置改革、QDII和港股直通车政策本身对AH股价差并没有显著影响。本文的研究成果进一步证明,两地股票市场分割以及内地资本流动的限制是造成AH股价差的根源。     

Risk assessment and profit sharing in business networks

Nowadays network is the preferred governance form to conduct economic transactions. Network solution allows to reach flexibility maintaining cost and quality level. Since network concept refers to a great variety of organizational hybrids it is possible to choose the one that fits better market requirements. The new trends in inter-organization relationships push towards network solutions: companies are interested in relationships with partners and customers to overcome resource dependence, to enter too risky market or simply differentiate their business portfolio. The proposed research focuses on the network concept aiming at highlighting threats and opportunities to investigate the double nature of the risk concept. Network structures offer flexibility and higher profit as a consequence and business risk sharing opportunity.These two aspects (profit and risk) are strictly related and have to be considered together to depict a complete scenario; this implies that risk assessment and management in network environment cannot neglect profit sharing or, in other words, that profit sharing mechanisms should use risk as driver. In this context our research proposes a methodology to measure risk taking into account network peculiarities; risk estimation is a basic step to evaluate the opportunity cost of capital needed to compute the network Net Present Value (NPV) that is assumed as base in the profit sharing process. The profit sharing process has been tackled using the Shapley value approach that is inspired to the fairness principle while the opportunity cost of capital is assessed using the Capital Asset Pricing Model (CAPM).     

规模组合、因子定价与均值方差张成 --来自中国A股的证据

本文从均值方差张成的角度探讨了多因子定价模型在中国的适用性,并对规模组合能否作为定价因子这一问题进行了实证考察。对沪深两市A股的10个规模组合的均值方差张成检验表明,大、中、小3个规模组合在短期内可以张成所有的规模组合的均值方差边界,这意味着这3个规模组合可以作为定价因子,解释其他风险资产收益率的变动。     

Idiosyncratic momentum and the cross‐section of stock returns: Further evidence

In this article, we evaluate the profitability and economic source of the predictive power of the idiosyncratic momentum effect, by using five popular asset pricing models to construct the idiosyncratic momentum. We show that all five idiosyncratic momentum strategies produce similar return predictability and consistently outperform the conventional momentum strategy in the cross‐sectional pricing of equity portfolios and individual stocks. This positive effect of idiosyncratic momentum on returns is consistent with the investment capital asset pricing model (CAPM). Further analysis reveals that the firm‐level idiosyncratic momentum effect cannot extend to the aggregate stock market.     

What Does the CAPM Say About Operating Leverage?

We examine the issue of operating leverage and firm value. Johnstone (2020), in this issue, questions existing results which indicate that higher operating leverage results in lower firm value. We agree with Johnstone (2020) that this result is to be questioned and present a number of arguments which indicate that operating leverage is irrelevant to the valuation of the firm in the context of the CAPM model.     

投资决策中基本折现率的确定及其调整

探讨了公司在项目投资决策中折现率的确定问题。提出了在公司项目投资决策中确定折现率应该采取的步骤:运用资本资产定价模型得到基本折现率,在此基础上考虑特定风险、股东要求的最低收益率、融资限额等因素,对基本折现率进行调整和改进,从而得到进行项目投资决策需要的财务折现率。     

Agency and Institutional Investment

In this paper we summarise and extend the agency‐based model of asset pricing of Brennan (1993) to show that the implied agency effects on asset pricing are too small to be empirically detectable: empirical tests confirm this and we show that the positive findings of Gomez and Zapatero (2003) are due to their choice of sample. We also derive new empirical implications for the composition of institutional investment portfolios and empirically confirm the major result, that institutional portfolios will be short the minimum variance portfolio.     

资产定价思想的发展

资产定价思想不仅是会计思想的核心内容,而且也是金融思想的重要方面,从20世纪50年代开始,经典金融学使用均衡定价和无套利定价这两种方法构建了一系列资产定价理论,促进了金融学不断向前发展。然而,经典的资产定价理论(如CAPM,APT等)的假设条件与资本市场的实际情况存在着一定的差距并在一定程度上影响了其解释能力,基于这一现实,研究者们扩展了理性投资者的假设从而创立了基于行为金融学的资产定价理论,行为金融资产定价理论通过应用心理学研究成果来修正行为人的信念和偏好形成方式,使资产定价理论的假设更符合行为人的实际决策过程。     

A dynamic CAPM with supply effect: Theory and empirical results

Breeden [Breeden, D. T. (1979). An intertemporal asset pricing model with stochastic consumption and investment opportunities. Journal of Financial Economics 7, 265–196] and Grinols [Grinols, E. L. (1984). Production and risk leveling in the intertemporal capital asset pricing model. The Journal of Finance 39, 5, 1571–1595] and Cox et al. [Cox, J. C., Ingersoll, J. E., Jr., & Ross, S. A. (1985). An intertemporal general equilibrium model of asset prices. Econometrica 53, 363–384] have described the importance of supply side for the capital asset pricing. Black [Black, S. W. (1976). Rational response to shocks in a dynamic model of capital asset pricing. American Economic Review 66, 767–779] derives a dynamic, multiperiod CAPM, integrating endogenous demand and supply. However, Black's theoretically elegant model has never been empirically tested for its implications in dynamic asset pricing. We first theoretically extend Black's CAPM. Then we use price, dividend per share and earnings per share to test the existence of supply effect with U.S. equity data. We find the supply effect is important in U.S. domestic stock markets. This finding holds as we break the companies listed in the S&P 500 into ten portfolios by different level of payout ratio. It also holds consistently if we use individual stock data.