ChatGPT SearchOct 12, 2026
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Data as of Oct 12, 2026A topic in Business Telecommunications Network Services.
Reviewed by Dimitry Apollonsky
AI summary
Zayo holds a wide lead as the default choice for low-latency dark fiber routes connecting financial exchanges and trading centers. Even as providers like FiberLight offer bespoke connections, Zayo remains the primary recommendation across high-frequency trading scenarios.
direct, ultra-low-latency dark fiber routes between major financial exchange hubs
direct-path dark fiber and connectivity between financial exchange data centers
broad global fiber ownership with dedicated dark routes focused on reliability
Mentioned in · Jul 8 – Oct 12, 2026
ChatGPT SearchOct 12, 2026
For high-frequency trading (HFT), the key is not simply finding a dark-fiber provider with the lowest advertised latency. It is finding the physically shortest, lowest-latency fiber route between your exact trading endpoints, with minimal optical amplification, regeneration, and intermediate equipment.
There is no universally lowest-latency dark-fiber carrier: the answer depends on which markets you're connecting, the actual fiber path, and whether you're optimizing for one-way latency, round-trip time (RTT), or jitter.
For a serious HFT evaluation, I'd compare providers on three things:
These are the providers I'd approach first for route-specific latency testing and commercial proposals, based on their documented financial-market infrastructure. This is a shortlist, not a verified ranking of current measured latency.
(Priority for NY–Chicago)
Dark fiber · Long-haul trading routes
Spread's signature route is an 825-fiber-mile connection between the New York and Chicago financial markets. CME Group's provider listing documents its dark-fiber offering and access to key trading colocation facilities. Spread is now part of Zayo's network portfolio.
Why evaluate it: A purpose-built, direct route for one of the most latency-sensitive U.S. trading corridors.
CME Group's Spread Networks listing
Dark fiber · Metro and long-haul
Zayo offers low-latency financial connectivity on multiple routes, including New York–Chicago and the New Jersey equity triangle. Its network also supports diverse routes and broader geographic reach.
Why evaluate it: A candidate for both the primary route and physically diverse backup paths, especially if your strategy spans multiple markets.
Zayo Global Low Latency Network
Metro dark fiber · New York region
Lightpath emphasizes owned fiber, engineered routes, and measured round-trip latency before contract signature. Its stated footprint covers 11 metro markets, with dense coverage around New York.
Why evaluate it: If your bottleneck is the last few miles between exchange colocation sites, data centers, and your trading servers, metro routing may be more important than the long-haul carrier.
Lightpath latency-sensitive connectivity
Financial-market transport · Private connectivity
NexGen has a documented history of building low-latency fiber transport for financial trading firms, including New York–Chicago connectivity. Its current route performance and availability should be confirmed directly.
Why evaluate it: An additional bidder for route-level comparison, pricing, and alternative network design.
For HFT, I would request a technical proposal from each shortlisted carrier containing the following:
| Requirement | What to request |
|---|---|
| Physical route | Actual fiber mileage, route map, and confirmation of whether the route is directly owned or leased from another carrier |
| One-way latency | Measured latency in each direction, with measurement methodology and timestamp |
| Round-trip latency | Measured RTT under representative operating conditions |
| Optical design | Number and locations of amplifiers, regenerators, and active network elements |
| Jitter | Distribution and tail latency, not just an average |
| Resilience |
Important: If you lease dark fiber, you can control the optical equipment you deploy, but the physical route still imposes a propagation-delay floor. In fiber, light travels at roughly 200,000 km/s, so an extra 100 km of fiber adds approximately 0.5 ms one-way before equipment delays.
For the lowest possible latency, compare the carriers' actual measured routes rather than relying on marketing claims such as “ultra-low latency” or “fastest network.”
The most useful next step is to identify the exchange endpoints. A provider that is competitive for NY–Chicago may not be the best option for connections within New Jersey or between European markets.
Choose your endpoints and requirements to focus the provider comparison.
Origin market
New York / New Jersey
Chicago
London
Frankfurt
Other / multiple markets
Destination market
Chicago
New York / New Jersey
London
Frankfurt
Other / multiple markets
Primary objective
Absolute minimum latency, regardless of cost
Minimum latency with a diverse backup route
Lowest cost while meeting a strict latency target
Preferred connectivity
Dedicated dark fiber
Dark fiber plus managed low-latency alternatives
Exchange or colocation endpoints (optional)
[Input placeholder: e.g. NYSE Mahwah ↔ CME Aurora] (Current value unavailable.)
[Compare providers for my route]
With the endpoints identified, the comparison can focus on the actual routes, documented latency figures, and providers worth contacting for a measured quote—not simply the biggest fiber operators.
Google AI ModeSep 23, 2026
When hunting for the absolute lowest latency paths for high-frequency trading (HFT) algorithms, standard enterprise telecom carriers won't cut it. You need specialized infrastructure providers that engineer their physical routes in a straight line as humanly possible ("trenching" through mountains and bypassing standard right-of-ways) or leverage cutting-edge optical technologies like hollow-core fiber.
The premier infrastructure and dark fiber providers dominating the ultra-low-latency financial corridors (such as the crucial Chicago-to-New York or transatlantic routes) include:
We are looking for dark fiber leasing options suitable for high-frequency trading. Who should we contact?
I need to find dark fiber leasing options that guarantee the lowest latency for high-frequency trading setups.
ChatGPT SearchSep 18, 2026
Several network operators lease dark fiber specifically suitable for ultra-low-latency / high-frequency trading (HFT). The most relevant U.S. providers include:
Google AI ModeSep 18, 2026
| Physically diverse backup route and its separate latency measurement |
| Commercial terms | Dark-fiber IRUs versus monthly leases, construction costs, minimum terms, and SLA credits |
To help narrow down the optimal physical path, tell me:
The key distinction is raw dark fiber vs. managed low-latency connectivity. For HFT, raw dark fiber can let you choose your own optics/equipment and control the physical-layer characteristics, but you need to evaluate the actual route rather than simply the carrier's advertised latency.
For example, on NYC ↔ Chicago, I'd put Zayo/Spread Networks at the top of the initial vendor list because its offering is explicitly built around that financial corridor and includes dark fiber.
For a serious HFT network RFP, I'd ask each carrier for:
If you tell me the two or more endpoints you're trying to connect (e.g. NYSE → NY4 → CME Aurora, NYC → Chicago, Chicago → Secaucus), I can narrow this down to the carriers that actually have fiber on those specific routes and compare their offerings.
Leasing dark fiber for high-frequency trading (HFT) and ultra-low-latency financial networks requires specialized telecom carriers . These providers engineer their physical routes to be as mathematically straight as possible—shaving off fractions of a millisecond by minimizing distance and avoiding unnecessary bends or signal regeneration.[](https://exainfra.net/industries/financial-markets/)[[2](https://www.lightreading.com/optical-networking/spread-unveils-low-latency-network)](https://www.lightreading.com/optical-networking/spread-unveils-low-latency-network)[[3](https://fiberguide.net/low-latency-optical-networks)](https://fiberguide.net/low-latency-optical-networks/)
Key providers offering dark fiber and ultra-low-latency infrastructure tailored to financial markets and major trading hubs include:
If you're targeting a specific route (like New York to Chicago, London to Frankfurt , or a specific metro data center cluster ), let me know so I can narrow down which provider owns the most direct path for those specific endpoints.
