You're the PM of Revolut's trading platform. Profits have declined to negative for the first time. How would you investigate this issue?

Focus on identifying key metrics that could indicate the root causes of the profit decline. Start by analyzing user engagement metrics, such as the number of active traders, trade volumes, and transaction fees. Then, consider external factors like market trends or competitor actions that could impact user behavior. Dive into customer feedback and support tickets to uncover any pain points or dissatisfaction. Finally, outline a structured approach to prioritize potential hypotheses and test them through data analysis or user interviews.