RT Journal Article SR Electronic T1 Algorithmic Trading and Fragmentation JF The Journal of Trading FD Institutional Investor Journals SP 18 OP 28 DO 10.3905/jot.2017.12.4.018 VO 12 IS 4 A1 Archana Jain A1 Chinmay Jain A1 Christine X. Jiang YR 2017 UL https://pm-research.com/content/12/4/18.abstract AB Prior studies on algorithmic trading (AT) have mostly focused on a single exchange. The authors use a public dataset provided by the Securities and Exchange Commission (SEC) covering all major U.S. exchanges to study the impact of AT and its fragmentation on market liquidity. Using a proxy of AT derived from trade to order volume ratio, they find that AT concentrated on a single exchange improves liquidity. However, AT fragmentation onto multiple exchanges is associated with deterioration in liquidity. Their findings suggest a market-making as well as predatory role of AT and have policy implications.TOPICS: Statistical methods, exchanges/markets/clearinghouses