One of the world's largest securities firms and global investment company and are backing a project to start a national stock exchange in Texas. Citadel Securities and BlackRock are among the investors in the new Texas Stock Exchange. TXSE Chairman James Lee says the Dallas-based group has raised about $120 million so far. The Wall Street Journal says the exchange is billing itself as a "more CEO friendly" alternative to the New York Stock Exchange and Nasdaq in the face of rising regulation. The Dallas Morning News says the TXSE will target companies in the "southeastern quadrant of the U.S."