Alternative display facility (ADF) is an equity

Stock

The capital stock of a business entity represents the original capital paid into or invested in the business by its founders. It serves as a security for the creditors of a business since it cannot be withdrawn to the detriment of the creditors...

 trading

Trader (finance)

A trader is someone in finance who buys and sells financial instruments such as stocks, bonds, commodities and derivatives. A broker who simply fills buy or sell orders is not a trader, as they are merely executing instructions given to them. According to the Wall Street Journal in 2004, a managing...

 facility created in the United States by the Financial Industry Regulatory Authority

Financial Industry Regulatory Authority

In the United States, the Financial Industry Regulatory Authority, Inc., or FINRA, is a private corporation that acts as a self-regulatory organization . FINRA is the successor to the National Association of Securities Dealers, Inc. ...

 (FINRA), a self-regulatory organization

Self-regulatory organization

A self-regulatory organization is an organization that exercises some degree of regulatory authority over an industry or profession. The regulatory authority could be applied in addition to some form of government regulation, or it could fill the vacuum of an absence of government oversight and...

 (SRO). The ADF is an alternative to the exchange for publishing quotations and for comparing and reporting trades. This differs from a trading facility with execution capabilities (stock exchange

Stock exchange

A stock exchange is an entity that provides services for stock brokers and traders to trade stocks, bonds, and other securities. Stock exchanges also provide facilities for issue and redemption of securities and other financial instruments, and capital events including the payment of income and...

) in that the exchange would simply send back to the owner of the displayed order a notice of execution. FINRA has operated an ADF since July 29, 2002.