Stock Exchanges and State Regulators Come to Finra's Defense in Constitutional Challenge

Also, banks mull how far to push their objections to CRA revamp

Finra, facing what it has called an “existential” federal court fight over its constitutionality, now has some allies. 

Its backers, who recently filed amicus briefs in the U.S. Court of Appeals for the D.C. Circuit, include other self-regulators like stock exchanges, state securities cops and attorneys who represent investors. Even a group that sets hea…