Large Financial Markets, Discounting, and No Asymptotic Arbitrage
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Date
2020
Publication Type
Journal Article
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yes
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Abstract
For a large financial market (which is a sequence of usual, "small" financial markets), we introduce and study a concept of no asymptotic arbitrage (of the first kind), which is invariant under discounting. We give two dual characterizations of this property in terms of (1) martingale-like properties for each small market plus (2) a contiguity property, along the sequence of small markets, of suitably chosen "generalized martingale measures." Our results extend the work of Rokhlin, Klein, and Schachermayer and Kabanov and Kramkov to a discounting-invariant framework. We also show how a market on [0, infinity) can be viewed as a large financial market and how no asymptotic arbitrage, both classic and in our new sense, then relates to no-arbitrage properties directly on [0, ∞).
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published
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Journal / series
Volume
65 (2)
Pages / Article No.
191 - 223
Publisher
SIAM
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Subject
Large financial markets; Asymptotic arbitrage; Discounting; No asymptotic arbitrage (NAA); No unbounded profit with bounded risk (NUPBR); Asymptotic strong share maximality; Dynamic share viability; Asymptotic dynamic share viability; Tradable discounter
Organisational unit
03658 - Schweizer, Martin / Schweizer, Martin