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arXiv math/0503473math.PRq-fin.CP
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无套利市场的特征

Characterization of arbitrage-free markets

Eva Strasser

摘要:

本文讨论了连续半鞅的无套利性的刻画。第一个主要结果,定理\refMainTheoremCharNA,推广了Levental和Skorohod [Ann. Appl. Probab. 5(1995)906-925]从扩散过程到任意连续半鞅。第二个主要结果,定理2.4,是一个较弱的概念的无套利上鞅密度的存在性的一个特征。无套利的相关概念较弱,相当于没有立即套利机会,这是Delbaen和Schachermayer [Ann. Appl. Probab. 5(1995)926-945]。这两个结果都是以任意半鞅在任意停时σ开始的条件来表示的。对于停时σ=0,这两个结果的必要部分是由Delbaen和Schachermayer [Ann. Appl. Probab. 5(1995)926-945]。本文的贡献是对相应的充分性部分进行了证明。

英文摘要:

The present paper deals with the characterization of no-arbitrage properties of a continuous semimartingale. The first main result, Theorem \refMainTheoremCharNA, extends the no-arbitrage criterion by Levental and Skorohod [Ann. Appl. Probab. 5 (1995) 906-925] from diffusion processes to arbitrary continuous semimartingales. The second main result, Theorem 2.4, is a characterization of a weaker notion of no-arbitrage in terms of the existence of supermartingale densities. The pertaining weaker notion of no-arbitrage is equivalent to the absence of immediate arbitrage opportunities, a concept introduced by Delbaen and Schachermayer [Ann. Appl. Probab. 5 (1995) 926-945]. Both results are stated in terms of conditions for any semimartingales starting at arbitrary stopping times σ. The necessity parts of both results are known for the stopping time σ=0 from Delbaen and Schachermayer [Ann. Appl. Probab. 5 (1995) 926-945]. The contribution of the present paper is the proofs of the corresponding sufficiency parts.

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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