The Impact of co-location of securities exchanges’ and traders’ computer servers on market liquidity

Alex Frino, Vito Mollica, Robert I Webb

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contribution


This study examines the impact of allowing traders to co-locate their servers near exchange servers on the liquidity of futures contracts traded on the Australian Securities Exchange. It provides some evidence of an increase in proxies for HFT activity following the introduction of colocation including raw message traffic, order to trade ratios and the volume associated with message traffic to trading volume. The paper also provides strong evidence of a decrease in bid ask spreads and an increase in market depth after the introduction of co-location. We conclude that the introduction of co-location enhances liquidity. Furthermore, this improvement in liquidity is not dependent on an increase in HFT activity. We conjecture that colocation improves the efficiency with which liquidity providers (including market maker HFTs) are able to make markets. We also provide estimates of the value of the improvement in liquidity to the broader market.
Original languageEnglish
Title of host publicationProceedings of the IV World Finance Conference
Place of PublicationLimassol, Cyprus
PublisherWorld Finance Conference
Number of pages22
Publication statusPublished - 2013
EventWorld Finance Conference (4th : 2013) - Limassol, Cyprus
Duration: 1 Jul 20133 Jul 2013


ConferenceWorld Finance Conference (4th : 2013)
CityLimassol, Cyprus


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