We study price formation in securities markets, using the sequential trade framework of Glosten and Milgrom. This paper makes one basic methodological advance over previous research on sequential securities trading: we allow for multiple trade sizes for traders to choose from in a multi-period market. We examine how trade size multiplicity affects the intertemporal dynamics of trading strategies, bid-ask spreads, and information revelation. We also show that price impact, as a function of trade size, is increasing and exhibits (discrete) concavity.
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Paper provided by EconWPA in its series Finance with number
0510031.
Find related papers by JEL classification: G - Financial Economics
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