More hedging instruments may destabilize markets |
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Authors: | WA Brock CH Hommes FOO Wagener |
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Institution: | aUniversity of Wisconsin, 1180 Observatory Drive, Madison, WI 53706, USA;bCeNDEF, School of Economics, University of Amsterdam, Roetersstraat 11, 1018 WB Amsterdam, The Netherlands |
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Abstract: | This paper formalizes the idea that more hedging instruments may destabilize markets when traders have heterogeneous expectations and adapt their behavior according to performance-based reinforcement learning. In a simple asset pricing model with heterogeneous beliefs the introduction of additional Arrow securities may destabilize markets, and thus increase price volatility, and at the same time decrease average welfare. We also investigate whether a fully rational agent can employ additional hedging instruments to stabilize markets. It turns out that the answer depends on the composition of the population of non-rational traders and the information gathering costs for rationality. |
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Keywords: | Financial innovation Asset pricing Hedging Reinforcement learning Bifurcations |
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