Project Rio is a real-time market monitoring platform developed by the BIS Innovation Hub, in collaboration with central bank partners, to keep pace with fast-moving electronic markets, especially foreign exchange (FX), where conditions can shift in fractions of a second. Traditional batch systems, which process information in hours or days, need to be complemented for implementing monetary policy or managing reserves; Rio illustrates how streaming analytics can provide immediate insights with latency often below two seconds, transforming high-frequency venue data into actionable views for human decision-makers.
Built on modern, open source technology, Rio streams live order book and trade data from the main FX venues where price discovery happens, harmonised through a market data aggregator to simplify integration and ensure consistent timestamps. Data flow through a real-time backbone into specialised processing engines that clean and reconstruct limit order books (LOBs) and calculate liquidity, activity and risk measures in near real time. An interactive dashboard displays these insights through a unified interface, combining livestreams with historical context so analysts can see what is happening as it happens and whether it is typical for that time of day.
The architecture separates ingestion, processing, storage and visualisation to achieve speed, resilience and flexibility. A high-performance store provides the dashboard with the latest snapshots, while a time series database retains a complete history for analysis. A dedicated layer handles more complex, multi-user queries without creating bottlenecks. This modular design allows teams to update individual components independently, add new instruments or venues – demonstrated by a successful extension to Brazilian real futures – and develop analytics without large-scale system overhauls.
Rio’s development followed an agile, user-centred process. A small, multidisciplinary team created prototypes with seven central banks, refining measures and visual design based on structured feedback. During a multi-month pilot involving nine central banks, users reported that Rio integrated seamlessly into workflows and received high satisfaction ratings, confirming both its value and approach. nevertheless, its components, methods and lessons have been reused across Innovation Hub initiatives and shared within the central bank community.
Rio has show how central banks can monitor algorithmic, fragmented markets in real time using widely accessible, modern technology. By combining streaming analytics, scalable storage and intuitive visualisation within a robust, adaptable architecture, Rio offers a practical blueprint for monitoring of fast-paced markets, bridging the gap between machine-speed markets and human-speed decision-making.