Develop a browser-based multiplayer game titled 'Fintech Velocity'. The game is designed to be a high-speed corporate training tool where teams manage a simulated global financial portfolio. The core mechanic relies on 'Mutual Assurance': when a player encounters a 'market volatility' event (represented by a slowing effect or obstacle), they are helpless until a teammate uses an 'empathy token' to assist them, boosting team speed and score. The game should support multiple concurrent rooms. Technical implementation must use WebSockets (e.g., Socket.io) for low-latency real-time communication, a React or Vue.js frontend for a responsive and modern fintech aesthetic, and a Node.js backend to handle game state logic. The visual design should reflect agility, using charts, data streams, and clean UI elements associated with financial technology.