This can refer to two different entities within finance:

Financial Markets Authority (AFM): This is the Dutch regulator responsible for overseeing the conduct of all parties in the financial markets in the Netherlands. The AFM ensures that financial markets operate fairly and transparently, and that consumers are protected.

Or.

Association of Futures Markets (AFM): An international organization representing exchanges and other entities engaged in futures and derivatives trading. The Association of Futures Markets promotes the importance and development of these markets worldwide.

This term refers to specific aspects of finance and is important to understand in the context of regulation, market surveillance and international business practices.