Algorithmic Trading and the Market for Liquidity
45 Pages Posted: 9 Feb 2012 Last revised: 12 Apr 2012
Date Written: April 11, 2012
We examine the role of algorithmic traders (AT) in liquidity supply and demand in the 30 DAX stocks on the Deutsche Boerse in January 2008. AT represent 52% of market order volume and 64% of nonmarketable limit order volume. AT more actively monitor market liquidity than human traders. AT consume liquidity when it is cheap, i.e., when the bid-ask quotes are narrow, and supply liquidity when it is expensive. When spreads are narrow AT are less likely to submit new orders, less likely to cancel their orders, and more likely to initiate trades. AT react more quickly to events and even more so when spreads are wide.
Keywords: algorithmic trading, liquidity, market monitoring
JEL Classification: G10, G14
Suggested Citation: Suggested Citation