Publication: Understanding liquidity: a closer look at the limit order book
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2000-07
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Abstract
This paper estimates a new measure of liquidity costs in a market driven by orders. It represents the cost of simultaneously buying and selling a given amount of shares, and it is given by a single measure of liquidity which is just an increasing function relating bid-ask spreads with size. This measure completely characterizes the cost of liquidity of any given asset. It does not suffer from the usual ambiguities related to either the bid-ask spread or depth when they are considered separately. With a single measure, we are able to capture all dimensions associated with liquidity costs. The seasonality behavior of the liquidity cost is also analyzed.
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Liquidity function, Liquidity cost, Open limit order book, Bid-ask spread, Depth, Adverse selection