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Národní úložiště šedé literatury Nalezeno 2 záznamů.  Hledání trvalo 0.01 vteřin. 
Markov Equilibrium between High Frequency Traders
 Šmíd, Martin
We model an optimal behaviour of a finite number of (perhaps high frequency) traders at a limit order market with a instrument possibly paying dividends. The traders are assumed to trade continuously and to maximize their discounted consumption while keeping the probability of near-bankruptcy states at a prescribed level. The latency times, ie., the delays between the order submissions and the corresponding order books' changes, are taken into account. We show that the process describing the market is Markov given the largest among information sets of the agents.
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Determinants of Stocks' Choice in Portfolio Competitions
 Šmíd, Martin ; Kuběna, Aleš Antonín
We study investment competitions in which the players invest a virtual amount of money into financial asset and those with highest returns, measured by the actual prices, are rewarded by fixed prizes. We show that the competition, seen as a game, lacks a pure equilibrium and that the ``max-min'' solution of the game lies in the extremal point of the feasible set having maximal probability of victory. We show further that if a mixed equilibrium exists then its atoms lie exactly in the extremal points with a non-zero probability of victory and its weights are close to corresponding probabilities of victory. We analyse empirically a portfolio competition held recently by the Czech portal ``lidovky.cz''; we find that the majority of people do not behave according to the game-theoretic conclusions. Consequently, searching for factors influencing a choice of particular stocks, we find that the participants' choice may be explained by several stock traits to a certain extent. We also show that participants tend to choose negatively diversified portfolios.
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