NYSE and Nasdaq Control of Stock Data Feeds Weakened by SEC (1)

Wall Street’s top regulator took one of its biggest steps to curb the power that the New York Stock Exchange and Nasdaq Inc. have over market data that is the lifeblood of modern stock trading.

For the first time in years, the U.S. Securities and Exchange Commission forced NYSE, Nasdaq and Cboe Global Markets Inc. to revamp the management of public data feeds that provide crucial information on real-time stock prices. The exchanges will also have to give securities firms and investors a seat at the table in key decisions about those feeds. The hope is that the public streams ...