Which FCA principle requires firms to observe proper market conduct standards?

• A. Consumer duty
• B. Observe proper market conduct standards
• C. Pay attention to clients' communication needs
• D. Manage conflicts of interest fairly

Answer: (B)

Market conduct is the FCA principle that sets the standard for how firms should behave in the markets. It requires firms to observe proper standards of market conduct, ensuring fairness, transparency, and integrity in trading and market interactions. This principle underpins orderly markets and helps prevent practices that could undermine confidence, such as manipulation or misrepresentation. The other options relate to different duties—treating customers fairly and achieving good outcomes (consumer duty), ensuring clear and appropriate communications with clients, and handling conflicts of interest—rather than the overarching behavioral standard in markets themselves.