In 1971, IBA merged with the Association of American Stock Exchange Firms (ASEF) to form the Securities Industry Association (SIA) and unify the voices of the related interests. Following the merger, the Public Securities Association (PSA), comprised of IBA’s Municipal Securities and Government Bonds Committees (est. 1918), incorporated as an independent organization representing securities firms and banks in the municipal, Treasury and federal agency securities markets. The name of the PSA was changed to The Bond Markets Association (TBMA) in 1997.

In 2006, the SIA and TBMA merged, bringing together the shared interests of their memberships. By representing the many segments of the financial industry, SIFMA has become the voice of the financial industry that is uniquely suited to provide trusted and expert information to policymakers, regulators, media, industry participants and the general public about the financial industry.