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Search in Asset Markets ∗ Ricardo Lagos Federal Reserve Bank of Minneapolis

By Guillaume Rocheteau

Abstract

We investigate how trading frictions in asset markets affect portfolio choices, asset prices and efficiency. We generalize the search-theoretic model of financial intermediation of Duffie, Gârleanu and Pedersen (2005) to allow for more general preferences and idiosyncratic shock structure, unrestricted portfolio choices, aggregate uncertainty and entry of dealers. With a fixed measure of dealers, we show that a steady-state equilibrium exists and is unique, and provide a condition on preferences under which a reduction in trading frictions leads to an increase in the price of the asset. We also analyze the effects of trading frictions on bid-ask spreads, trade volume and the volatility of asset prices, and find that the asset allocation is constrained-inefficient unless investors have all the bargaining power in bilateral negotiations with dealers. We show that the dealers ’ entry decision introduces a feedback that can give rise to multiple equilibria, and that free-entry equilibria are generically inefficient

Topics: asset prices, bid-ask spread, execution delay, liquidity, search, trade volume
Year: 2006
OAI identifier: oai:CiteSeerX.psu:10.1.1.415.5119
Provided by: CiteSeerX
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