Initial Enlargement in a Markov chain market model

Details Initial Enlargement in a Markov chain market model Initial Enlargement in a Markov chain market model

2011-08-12

arxiv.org/abs/1108.2623v2

Economy

Quantitative Finance

Trading and Market Microstructure

Scientific paper

Enlargement of filtrations is a classical topic in the general theory of stochastic processes. This theory has been applied to stochastic finance in order to analyze models with insider information. In this paper we study initial enlargement in a Markov chain market model, introduced by R. Norberg. In the enlargened filtration several things can happen: some of the jumps times can be accessible or predictable, but in the orginal filtration all the jumps times are totally inaccessible. But even if the jumps times change to accessible or predictable, the insider does not necessarily have arbitrage possibilities.

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