The Financial Industry Regulatory Authority, Inc. (FINRA) is an independent and self-regulatory organization responsible for regulating financial entities as well as arbitration of financial services rendered in the New York Stock Exchange. Since formed in 2007, FINRA is considered to be one of the largest regulators of all financial companies in the US.
FINRA was preceded by the National Association of Securities Dealers, Inc. (NASD). After a significant recapitalization of NASDAQ in 2007, FINRA was formed through an SEC-approved merger between NASD and NYSE Regulation Inc. However, brokers in FINRA mostly deal with equities, bonds, futures, and options. If the member companies are willing to offer forex trading, they need to be a member of the NFA and the CFTC, along with being a member of the FINRA.