Latency, Event-Driven Systems, and Kill-Switch Design
Latency creates risk windows; kill-switches turn risk metrics into hard stop conditions in event streams.
In event-driven trading, delays between market events and system actions create unhedged exposure windows.
Latency budgets and monitoring quantify how much slippage or inventory can accumulate before intervention.
Kill-switch logic translates path-dependent risk conditions into deterministic triggers that halt or scale down activity.
A kill-switch monitors drawdown and sends a flat signal when losses pass a threshold. In an event-driven system, latency means the actual exit happens later. The shaded window shows the extra risk created by that delay.
The red line marks the first time drawdown crosses the threshold: that is when the kill-switch logic fires. The orange line shows when the position is actually flat after latency and event processing.
Increasing latency widens the shaded window and worsens the orange bar: you still get some protection relative to “no kill”, but you give up part of the ideal protection. In real systems this latency budget includes market data delay, decision logic, risk checks and exchange routing, so engineering and risk teams must treat it as a quantitative design parameter, not a footnote.