Top-of-book quote and spread analysis, end-of-day OHLC price files, official close / previous-close referencing, last-sale and turnover monitoring, mark-to-market and valuation inputs, intraday monitoring and reference pricing for European Market + CH + UK.

SIX 1BBO turns the fragmented feeds of the SIX Group venues into a single, coherent product: 

• One instrument, one view. Consolidated around the ISIN; clients never reconcile venues. 
• Two clear dimensions. A Trade dimension carrying accumulated volume, last price, previous close and OHLC; and a Quote dimension carrying the best bid and offer across the group. 
• Complete snapshots, not fragments. Every published row carries the full session picture for its instrument. 
• Real-time and historical from one pipeline. Streaming delivery and queryable history are produced by the same publish, with at-least-once guarantees and recovery of intraday state across failures. 

1BBO is available both as a live stream and as history, with no separate integration: 

• Real-time streaming — subscribers receive each trade and quote row as it is published. 
• Historical timeseries via REST — every published row is persisted as it arrives, so the intraday history and prior sessions are queryable immediately, with no separate end-of-day load step. Limit to 1 day current trading session.
• File-based delivery direct from the Web API — the same REST call accepts a parameter and returns the result set as a CSV file download ( format=CSV query text/csv , sent as a file attachment) instead of JSON.