The Impact of Competition and Information on Intraday Trading

Katya Malinova, Andreas Park

Research output: Contribution to journalJournal articleResearchpeer-review


In a dynamic model of financial market trading multiple heterogeneously informed traders choose when to place orders. Better informed traders trade immediately, worse informed delay - even though they expect the market to move against them. This behavior generates intraday patterns with decreasing spreads, decreasing probability of informed trading (PIN), and increasing volume. We predict that policies that foster market entry improve the welfare of uninformed traders and lead to increased market participation by incumbent traders. Technological advances that lead to better signal processing also encourage market participation and increase volume but at the expense of uninformed traders' welfare.
Original languageEnglish
JournalJournal of Banking & Finance
Issue number1
Pages (from-to)55-71
Publication statusPublished - Jul 2014

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