信息冲击下摩擦市场的最优消费投资组合

Optimal consumption-investment selection in frictional market with information shock

研究了信息冲击下摩擦市场中的最优消费投资组合问题.在传统模型Constantinides(1986)基础上加入信息冲击,将摩擦市场动态化,得到了最优消费投资组合解.结果表明,与传统模型相比较,加入信息冲击后,交易成本的变化对最优消费投资组合解的影响显著增大,解释了传统模型与实证结果之间的矛盾,说明交易成本在资产定价模型中是不容忽视的因素.

An optimal consumption-investment selection in frictional market with information shock is studied in this paper. A dynamic model of the frictional market is proposed by introducing an information shock on the basis of the traditional model Constantinides （1986）, and the optimal consumption-investment solution is established. The result shows that the influence of the transaction costs on the consumption-investment solution is much more significant than that of the traditional model. It also indicates that the transaction cost is a very important factor in the asset-pricing model.