U.K. and U.S. trading of British cross-listed stocks: an intraday analysis of market integration

This article analyzes intraday patterns for U.K. and U.S. tradingof British cross-listed stocks. For each market, the intradaypatterns for these stocks closely resemble those of otherwisesimilar, non-cross listed stocks. There is a 2-hour period eachday when cross-listed stocks are traded both in New York andin London. This overlap is characterized by concentrated tradingas private information, originating in New York, gets incorporatedinto prices in both markets. Cross-border competition for orderflowtends to reduce already declining spreads in London. By contrast,New York specialists maintain