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arXiv math/0602594math.PRq-fin.PR
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有限离散时间的鞅选择问题与资产定价

Martingale selection problem and asset pricing in finite discrete time

Dmitry B. Rokhlin

摘要:

给定一个集值随机过程$(V_t)_{t=0}^T$,如果存在一个适应的选择子序列$ξ_t\in V_t$,且允许一个等价的鞅测度,则我们说鞅选择问题是可解的.本说明的目的是强调这个问题与一般离散时间市场模型中的资产定价问题之间的联系,该模型具有投资组合约束和交易成本。对于相对开凸集$V_t(ω)$的情形,给出了适当广义鞅选择问题可解的有效充要条件。我们表明,这一结果允许获得计算上可行的公式或有权益的价格界限。对于货币市场的情况下,我们也给出了评论的资产定价的第一基本定理。

英文摘要:

Given a set-valued stochastic process $(V_t)_{t=0}^T$, we say that the martingale selection problem is solvable if there exists an adapted sequence of selectors $ξ_t\in V_t$, admitting an equivalent martingale measure. The aim of this note is to underline the connection between this problem and the problems of asset pricing in general discrete-time market models with portfolio constraints and transaction costs. For the case of relatively open convex sets $V_t(ω)$ we present effective necessary and sufficient conditions for the solvability of a suitably generalized martingale selection problem. We show that this result allows to obtain computationally feasible formulas for the price bounds of contingent claims. For the case of currency markets we also give a comment on the first fundamental theorem of asset pricing.

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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