Identifying BLOCKS in Atlantis

Starting in 2024, Atlantis can be used to view and settle cleared, "Off Exchange" Blocks. These block transactions are not given-up, but "alleged" to an end account. FIA Tech sources this data (where available) from exchange feeds (ie. IceBlock) and when not available, directly from Inter-Dealer Brokers.  These non-given up Blocks can be identified by their Sub Asset Class and Trading Venue in Atlantis.  Please read the below article for more information.

NOTE: FIA Tech receives Block trades that are given-up and cleared at the exchange in our standard ETD trade feeds.  These given-up blocks are categorized under the Sub Asset Class "ETD" in Atlantis, and will continue to match to GUAs and settle as such in Atlantis.

Sub Asset Class

Sub Asset Class is present as an external filter and aggregation within the Summary screen. By selecting "BLOCKS", you can easily separate out BLOCKS trades from ETD & USLO trades by using this filter prior to loading the grid.

Trading Venue

Trading Venue is an aggregation in Atlantis which displays how a trade was executed.

If a trade enters Atlantis from the exchange and has a Sub Asset Class of "BLOCKS" but no Trading Venue is provided, it will be identified as "BLOCK" Trading Venue.

If a BLOCKS trade enters Atlantis and the exchange provides a specific Trading Venue, then the data in Atlantis will display with the relevant Alphabetical prefix + a semi-colon [;]. Example: X;BLOCK or E;BLOCK

NOTE: Trading Venue is available in the Extended Legacy CSV report as well as the Daily Digest. Sub Asset Class is not currently available in either but will be added later in 2024. You can learn more about these reports here.

If your firm is interested in viewing and settling block trades in Atlantis, please reach out to hello@fia-tech.com for more information.