Financial institutions have spent years and vast budgets on market connectivity, wiring up new venues, expanding execution infrastructure and racing to ensure traders can reach liquidity wherever it emerges.
Success has long been measured in reach and speed. But a harder question is now surfacing: how many venues can a person actually understand, navigate and control at once?
Corlytics recently discussed the power of 400 trading venues, and one human brain.
Many firms today operate across hundreds of trading venues, each with its own interface, terminology, execution protocol and rulebook. The industry has typically treated this as a technology problem: connect the venue, acquire the data, move on. In reality, connectivity is only the starting point. The bigger challenge is converting hundreds of distinct ways of working into a single operating model that staff can use effectively.
Individually, a new venue rarely looks like a major addition, perhaps a different screen, a slightly altered workflow, a new rule or two. But organisations are not operating on one venue; they are operating on hundreds simultaneously, and small variations compound into serious complexity. What gets described as a “400-screen problem” is really a human limitation: people are not built to process hundreds of unrelated operating environments at once.
That complexity is not just an inconvenience, it is a source of operational risk. When a trader carries out economically identical activity across different venues but faces different terminology, execution mechanics and compliance obligations each time, attention shifts from the trade itself to remembering how the venue works. Working memory gets consumed by process rather than decision-making, onboarding slows, controls become harder to maintain, and the likelihood of rule breaches or process failures rises.
The costs extend well beyond the desk. Behind each venue sits a constantly shifting set of rulebooks, market access requirements and surveillance obligations, all of which must be tracked, assessed and reflected in policies and controls. Much of this work is manual and largely invisible in budget terms, even though it stems directly from technological complexity, and it is becoming harder to sustain as venue numbers keep climbing.
The next phase for the industry, therefore, is not more connectivity but more intelligence. Rather than expecting professionals to absorb the nuances of hundreds of individual venues, firms need systems that can monitor rulebooks continuously, flag changes automatically, map their impact on existing controls, and present it all through one consistent workflow. The aim is not to remove human judgement but to strip out unnecessary cognitive burden.
Read the full Corlytics post here.
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