We study the impact of technology on the reaction of financial markets to information, focusing on the foreign exchange market. We contrast the 'thin-skinned' view that technological improvements cause markets to react more to new information with the 'thick-skinned' view that they react less....

Focusing on the foreign exchange reaction to macroeconomic announcements, we show that fast trading is positively and significantly correlated with the entropy of the distribution of quoted prices in reaction to news: a larger share of fast trading increases the degree of diversity of quotes in...