The goal of this paper is to examine the impact of the 1975 Congressional mandate to integrate the trading of NYSE-listed stocks. The conclusions are: Most of the time, the NYSE quote matches or determines the best displayed quote, and the NYSE is the most frequent initiator of quote changes....

The goal of this paper is to examine the impact of 1975 Congressional mandate to integrate the trading of NYSE listed stocks. The conclusions are: Most of the time, the NYSE quote matches or determines the best displayed quote, and the NYSE is the most frequent initiator of quote changes....

In response to the 1975 Congressional call for a national market system to provide a transparent link across individual markets that trade NYSE-listed stocks, the SEC caused the implementation of three electronic systems that provide a partial integration of these markets. This partial...