Glossary · Technology & Connectivity
Co-Location
Also: colocation, co-located servers
Published
Co-Location — Co-location is the placement of a trading firm's servers in the same data center as the matching engines and connectivity hubs of the venues and counterparties it trades with, reducing network round-trip time to the physical minimum. In digital assets, Equinix NY4 in New York and LD4 in London are common co-location sites.
Why Location Matters
Light in fiber travels roughly 200 kilometers per millisecond, so distance sets a floor on how fast a quote can reach a venue and a fill can come back. A market maker that updates quotes in response to price changes, or a desk that hedges a block across venues, is exposed for as long as that round trip takes. Placing servers in the same facility as the venues' systems removes most of the distance and much of the network variability.
Equinix NY4 and LD4
Financial connectivity clusters in a small number of facilities where venues, brokers, and market data providers interconnect over direct cross-connects. Equinix NY4 in Secaucus, New Jersey, and LD4 in Slough, west of London, are two of them, and digital asset venues and liquidity providers have followed traditional markets into those sites. A provider co-located in both can serve clients and hedge in the two main time zones with consistent latency.
What Co-Location Does Not Do
Co-location shortens the network path; it does not make a slow system fast. Throughput, quoting logic, and risk checks determine whether the latency advantage reaches the client.
Sources
- Equinix Data Centers — Equinix
- Stillman Digital, Lightning Execution Speed — Stillman Digital, Sep 2026