Six years after a global financial crisis exacerbated by the lack of transparency in the market for U.S. mortgage debt, regulators are planning only a small step toward offering the public more information on trading.

The Financial Industry Regulatory Authority’s board yesterday authorized the industry-funded watchdog’s staff to seek comment on a proposal to expand its dissemination of transaction data to more types of securitized debt. The notes include home-loan securities without government backing and collateralized debt obligations, Chairman and CEO Rick Ketchum said in a video posted on Finra’s website.