The Financial Markets Standards Board (FMSB) has published a Statement of Good Practice on unauthorised trading frameworks to help firms prevent and mitigate the risk of unauthorised trading activity in wholesale markets. The statement outlines good practices across 13 key areas, including governance, accountability, and controls. It recommends that firms establish a clear authorised trading framework that defines authorisation perimeters, documents roles and responsibilities across the front-to-back trade lifecycle, and embeds a strong risk culture. The statement advises firms to implement both preventative and detective controls—spanning pre-trade to post-trade stages—to identify and mitigate unauthorised activity. It also highlights the importance of consistent consequence management, effective escalation and reporting procedures, and ongoing testing, review, and horizon scanning to assess control effectiveness and detect emerging risks. Additionally, it emphasises the integration of management information, analytics, and accountability mechanisms to deter fraudulent or manipulative trading. The guidance applies to all forms of trading but does not address specific trading variations such as end-to-end controls, risk, algorithmic trading, or market abuse.