关于折现资产价格过程的半鞅性质
证券定价
2009-11-02 v5 概率论
摘要
本文考虑了一个代理人使用现实可行的买入并持有策略组合进行交易的金融市场模型。对折现资产价格过程仅做了最小化假设——特别是,并未预先假定其具有半鞅性质。通过一个自然的市场存续性假设,即不存在第一类套利,我们确立了折现资产价格必须为半鞅。在一个稍加特化的情形中,我们将上述结果推广为资产定价基本定理的一个弱化版本,该版本涉及严格正的超鞅通缩因子,而非等价鞅测度。
引用
@article{arxiv.0803.1890,
title = {On the semimartingale property of discounted asset-price processes},
author = {Constantinos Kardaras and Eckhard Platen},
journal= {arXiv preprint arXiv:0803.1890},
year = {2009}
}
备注
11 pages. The text has been thoroughly revised and there are new results. This is the 1st part of what comprised the older arxiv submission arXiv:0803.1890 "On financial markets where only buy-and-hold trading is possible" by the two authors