Regulation Best Interest
The SEC standard requiring broker-dealers to act in a retail customer's best interest when recommending securities or account types, built on four obligations: disclosure, care, conflict-of-interest, and compliance — plus delivery of the Form CRS relationship summary.
Form CRS summarizes services, fees, conflicts, and disciplinary history in plain English and must be delivered at or before the first recommendation. Investment advisers remain under the separate fiduciary standard — Reg BI is the broker-dealer counterpart.