A Model of True Spreads on Limit Order Markets
28 Pages Posted: 21 Apr 2011
Date Written: April 19, 2011
Abstract
True spreads are not directly observable and represent the continuous demand and supply schedule for stock liquidity by heterogeneously informed market participants on limit order markets. Observed spreads are true spreads quantized by minimum market tick size. A maximum likelihood regression model of true spreads is developed. True spreads are modelled as a continuous positive distribution parameterized by stock turnover and volatility. Nominal stock price is not a significant explanatory variable in modelling true spreads. Nominal stock price is shown to be a significant explanatory variable of observed spreads only as an artifact of minimum tick size.
Keywords: True Spread, Censored Spread, Observed Spread, Tick Size, Exchange Policy
JEL Classification: G14, C52
Suggested Citation: Suggested Citation
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