Intraday Market Price Integration for Shares Cross-Listed Internationally
研究加拿大股票在美国交叉上市后，日内交易执行价格差异的变化，发现该差异与国内外有效价差差异等价，且受最小报价单位变动影响。
This study investigates market price integration by testing per-share trade execution price or cost (TEP/C) differentials for matched intraday trades for a sample of Canadian shares cross-listed in the U.S. The TSE trade price advantage over the entire time period changed significantly after both the TSE's own minimum quotation increment reduction and that of its U.S. competitors. We show that the differential TEP/C is equivalent to the international effective spread differential and that market quality comparisons, which benchmark using the National instead of the International BBO, need to compare both national effective half-spread and midspread differences. Our cross-sectional regression results support our predictions that TEP/C differentials can be explained by differences in national midspreads and by ex ante proxies of national effective half-spreads. The TEP/C differentials vary inversely with increasing levels of our measure of signed market nonfragmentation.