NATIONAL BUREAU OF ECONOMIC RESEARCH
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Augmenting Markets with Mechanisms

Samuel Antill, Darrell Duffie

NBER Working Paper No. 24146
Issued in December 2017, Revised in August 2019
NBER Program(s):The Asset Pricing Program

In our modeled setting, we show that the now-common practice of size discovery detracts from overall financial market efficiency. A continually operating exchange uses double auctions to discover prices and clear markets. At each of a series of size-discovery sessions, efficient asset allocations are achieved using terms of trade that are based on the most recent exchange price. Traders can mitigate their exchange price impacts by waiting for size-discovery sessions. This waiting causes socially costly delays in the rebalancing of asset positions across traders. As the frequency of size-discovery sessions is increased, exchange market depth is further lowered and position rebalancing is further delayed, more than offsetting the gains from trade that occur at each of the size-discovery sessions.

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Document Object Identifier (DOI): 10.3386/w24146

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