In U.S. equities, many capabilities that once differentiated sophisticated trading firms have become table stakes. Constant, multi-path and deeply automated market access is now simply assumed, with minimal tolerance for latency variance or operational disruption. The competition has moved to the architectural level: the software and infrastructure that support these functions.
For most serious U.S. equities participants – banks, broker-dealers, ATSs, hedge funds and market makers – the operating model now consists of some combination of:
Simultaneous connectivity to multiple liquidity sources, spanning lit exchanges, dark pools and other venues
Consumption of both direct exchange feeds and SIP data, often in parallel, depending on strategy and downstream use cases
Participation across an expanding session structure, as clearing, venue hours and reporting infrastructure move at different speeds toward continuous operation
Real-time smart order routing and internalization, driven by continuously updated market data
Embedded pre-trade risk controls, enforced without introducing material latency
Always-on execution, with little distinction between “normal” and peak market conditions
These requirements are no longer exceptional. They define the cost of entry in modern U.S. equities markets. What has changed is the strain these assumptions place on legacy trading architectures.
Trading System Strain in U.S. Equities
As automated, interconnected trading workflows become more widespread, resilience and consistency have become critical differentiators. The pressure shows up in very specific ways inside U.S. equities trading systems:
Market data must be normalized consistently across venues so routing and pricing logic can act on a coherent view of the market, and clients can deploy multiple applications using a consistent translation across markets.
Ingestion must be lossless and deterministic. Today, burst conditions often expose packet loss and queuing delays that propagate downstream and can lead to a chain reaction of technical issues and client impact.
Latency must be predictable, not merely low, because microsecond-level variance can materially affect routing decisions.
Data distribution must be efficient and selective, delivering only what each consumer requires. The vast quantities of data in the U.S. equities market mean many applications need careful filtering of what they receive to remain functional.
Each of these pressures compounds the others, steadily eroding execution quality and confidence in system behavior under stress.
Execution Reliability Starts Upstream
At Pico, we believe that execution systems are only as reliable as the data they consume. In modern U.S. equities systems, order execution gateways, pre-trade risk controls and order management components are tightly coupled to incoming market data. Weaknesses in ingestion or normalization propagate quickly, affecting routing behavior and increasing operational risk.
This has led many firms to favor architectures that combine market data processing and order execution within a single, coherent framework, reducing handoffs and simplifying control. The objective is not only low latency, but predictable behavior under load – particularly when markets are volatile and volumes spike.
The sheer scale of today’s leading equities businesses only compounds the issue. Firms are under pressure to support more venues, more strategies and more internal consumers of market data, without multiplying systems or integration points. This has accelerated interest in standardized APIs, unified platforms and deployment models that enable firms to retire legacy components while improving performance. The ability to support multiple asset classes, venues and execution styles – through a single, high-performance interface, and in a consistent, repeatable manner – has become a practical requirement, not just an architectural ideal.
24 Hour Trading Complexity
On July 7, 2026, the SEC approved the CTA and UTP plan amendments allowing the Securities Information Processors to extend their operating hours, with production launch set for December 6, 2026 and an industry testing schedule already published. From that date, the SIPs will run roughly 23 hours a day, five days a week - 9:00pm ET Sunday to 8:00pm ET Friday, with a one-hour maintenance window each evening.
This change is major in regard to its impact on U.S. equities market structure, creating significant opportunity for broader retail and internal participation. The firms responsible for the systems consuming data and routing orders, have many operational considerations, not least how to now resource a production system 23 hours a day.
Redline Software: A Versatile Solution for U.S. Equities
Against this backdrop, Pico's Redline Software is designed to sit at the center of the modern U.S. equities trading system – where market data ingestion, normalization and execution converge.
Redline software combines ultra low-latency market data processing with normalized feed distribution and high-performance order execution in a single, coherent platform. Its ticker plant capabilities allow firms to ingest direct exchange feeds and SIP data, normalize them across venues and distribute precisely the views each downstream system requires, whether BBO and NBBO, full depth or per-venue books, without introducing unnecessary latency or complexity. Flexible messaging functionality like conflation can be turned on in addition. Just as importantly, it does this with deterministic behavior and a lightweight footprint, even under burst conditions.
On the execution side, Redline’s Order Execution Gateway extends this consistency into the order path. Optimized execution APIs, integrated pre-trade risk controls and comprehensive order tracking and logging help ensure that routing decisions and risk checks behave predictably as volumes and strategies scale. By reducing handoffs between disparate systems, Redline limits the timing variance and operational friction that often emerge in fragmented architectures.
Redline supports modernization without forcing firms to rebuild their trading systems from scratch. It enables U.S. equities participants to retire legacy components, standardize on a single high-performance interface and scale participation across venues and strategies without increasing complexity. Pico's global operations are already well equipped to handle the upcoming 23 hour U.S. equities trading day, supporting global multi-asset markets.
This is where infrastructure moves beyond plumbing, and where software architecture determines whether capabilities can be delivered reliably at scale. When multi-venue participation, automated routing and continuous execution are table stakes, the quality of the underlying architecture determines whether those capabilities remain an advantage or quietly become a source of risk. Platforms like Redline allow firms to treat infrastructure as a strategic asset, one that underpins execution quality, strengthens risk control and provides confidence that systems will behave as expected when markets are most demanding.
To learn more and explore how Redline supports U.S. equities workflows, speak with a Pico expert today.
