A NOTE ON ARBITRAGE AND CLOSED CONVEX CONES

We give an example of a subspace K of     such that     , where     denotes the closure with respect to convergence in probablity. On the other hand, the cone   C ≔ K − L ^∞₊  is dense in   L ^∞  with respect to the weak-star topology  σ( L ^∞, L ¹)  . This example answers a question raised by I. Evstigneev. The topic is motivated by the relation of the notion of no arbitrage and the existence of martingale measures in Mathematical Finance.     

Financial integration and the price of world covariance risk: Large- vs. small-cap stocks

We investigate whether recent country-level evidence of global pricing is particular to large-cap stocks. Specifically, we examine cross-country return correlations and conduct asset pricing tests on three size-based stock portfolios for nine developed countries over the period from 1980 to 2004. We find that large-cap stocks realize significant comovements across countries, whereas small-cap stocks realize smaller average correlations (relative to both large-cap stocks and small-cap stocks across countries). More important, asset pricing tests suggest that while large-cap stocks are priced globally, global pricing is rejected for most small-cap stocks. Finally, the evidence indicates that financial integration deepened in recent years primarily for large-cap stocks. Overall, the results suggest that the global pricing pertains chiefly to large-cap stocks.     

Computing equilibria of GEI by relocalization on a Grassmann manifold

An algorithm is described to compute equilibria of the general economic model with incomplete asset markets, that is, of GEI. The algorithm is based on the existence of a route of zeros of a homotopy whose domain includes the price simplex and a Grassmann Manifold. This route is followed, in effect, by localizing and following diffeomorphic pieces in Euclidean space, and by relocalizing as is necessary.     

论金融资产管理公司的经营目标与财务目标

本文在分析我国金融资产管理公司的经营性质和特殊使命的基础上,结合对企业财务理论知识的研究,提出了我国金融资产管理公司的经营目标与财务目标。     

上市公司利润操纵的经济动机

政府的每一次政策出台都为企业带来了新的生机与动力,但同时也诱导着一些企业进行着利润操 纵,我们应该看到,中国股票市场走过的10年道路中,规范与反规范的争斗从来没有停止过,正是由于 这样,促使我国证券市场不断发展。     

Closing small open economy models

The small open economy model with incomplete asset markets features a steady-state that depends on initial conditions and equilibrium dynamics that possess a random walk component. A number of modifications to the standard model have been proposed to induce stationarity. This paper presents a quantitative comparison of these alternative approaches. Five different specifications are considered: (1) A model with an endogenous discount factor (Uzawa-type preferences); (2) a model with a debt-elastic interest-rate premium; (3) a model with convex portfolio adjustment costs; (4) a model with complete asset markets; and (5) a model without stationarity-inducing features. The main finding of the paper is that all models deliver virtually identical dynamics at business-cycle frequencies, as measured by unconditional second moments and impulse response functions. The only noticeable difference among the alternative specifications is that the complete-asset-market model induces smoother consumption dynamics.     

The relevance of currency risk in the EMU

We investigate how the elimination of intra-European exchange risk may affect international financial markets using a conditional version of the International CAPM. We estimate the EMU and non-EMU components of aggregate currency risk and document significant exposures to both. The premium for EMU risk is positive and associated with exposure to the French, Italian and Spanish currencies. The premium for non-EMU risk is consistently negative and accounts for most of the aggregate currency premiums. In the 1990s, exposures to EMU risk declined significantly while exposures to non-EMU risk increased. Hence the adoption of the Euro is unlikely to have a large impact on aggregate currency risk premiums.     

对我国金融资产管理公司转型的思考

经过5年多的发展,我国金融资产管理公司(AMC)到现在面临转型。本文分析了我国金融资产管理公司转型的必然性,就转型的路径选择做出三种预测,以及对金融资产管理公司转型提出一些准备。     

对ESOP激励有效性的质疑

本文提出在ESOP实施过程中存在着员工持股股份占企业总股份的比例较低;员工个人持股比例很低的现状,并针对这种现状,质疑“有效员工激励”是否能够实现。本文将结合模型,主要从ESOP是否能增加员工有形动力和是否能增加员工无形动力两个方面来具体阐述自己的观点。     

商业银行资产负债结构与流动性风险控制

流动性风险产生的实质是由于资产、负债的不匹配所导致的。因此,合理调整资产负债结构,能有效地控制流动性风险。