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arXiv 1301.0280q-fin.PMmath.OC
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当前财富效用下的效用最大化:哈密顿-雅可比-贝尔曼方程解的正则性

Utility maximization with current utility on the wealth: regularity of solutions to the HJB equation

Salvatore Federico, Paul Gassiat, Fausto Gozzi

摘要:

考虑了当前效用也依赖于财富过程的投资-消费组合的效用最大化问题。出现这样的问题,例如,在具有随机水平或随机交易时间的投资组合优化中。为了克服这个问题的困难,我们使用了对偶方法。我们定义了一个对偶问题并利用动态规划方法处理它,证明了相关的哈密顿-雅可比-贝尔曼方程的粘性解属于一类合适的光滑函数。这允许定义原始哈密顿-雅可比-贝尔曼方程的光滑解,证明该解在合适的类中确实是唯一的,并且与原始问题的值函数一致。一些金融应用的结果。

英文摘要:

We consider a utility maximization problem for an investment-consumption portfolio when the current utility depends also on the wealth process. Such kind of problems arise, e.g., in portfolio optimization with random horizon or with random trading times. To overcome the difficulties of the problem we use the dual approach. We define a dual problem and treat it by means of dynamic programming, showing that the viscosity solutions of the associated Hamilton-Jacobi-Bellman equation belong to a suitable class of smooth functions. This allows to define a smooth solution of the primal Hamilton-Jacobi-Bellman equation, proving that this solution is indeed unique in a suitable class and coincides with the value function of the primal problem. Some financial applications of the results are provided.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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