A group backed by more than two dozen investors—including Citadel Securities and BlackRock—is planning to start its own stock exchange in Texas, it said Wednesday, in an attempt to compete ...

The new exchange would be based in Dallas as it looks to take on the world-famous New York Stock Exchange and Nasdaq.

Gov. Greg Abbott says that the state's new stock exchange "will ensure that businesses have access to capital" and more choices.

The Texas Stock Exchange, based in Dallas, has the backing of BlackRock and Citadel Securities. But challengers to the dominant New York markets have gained little traction.

U.S. regulators approved the nation's first 24-hour stock exchange on Wednesday, marking a significant shift in American securities trading as retail investors increasingly demand round-the-clock ...