Seminari del Dipartimento di Matematica

Seminario del 2017

Claudio Fontana

Information, arbitrage, and the price of informational arbitrage

nel ciclo di seminari: SEMINARI DI FINANZA MATEMATICA

probabilità

In financial markets, the introduction of inside information can lead to profitable trading opportunities and, in particular, to arbitrage possibilities. In the context of stochastic finance, this issue can be addressed by relying on the theory of enlargement of filtrations. We present some simple examples where informational arbitrage is possible and study the absence of arbitrage under additional information in the context of general semimartingale models. Finally, we try to determine the value of a private information which allows to realize arbitrage opportunities.