Your Surveillance Efficiency - Lexicon Triggers

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YOUR SURVEILLANCE EFFICIENCY

Lexicon Triggers SHIELD Lexicon-based detection in electronic communications can be a bit like using a sledgehammer to crack a nut. Sure, it almost gets the job done, but creates huge inefficiencies and potentials risks. When it comes to lexicon-based detection, built around alerts that are triggered when certain keywords are used, one of the biggest problems is the enormous number of false positives that typically return. This makes the alerts that result from it virtually as ineffective as having no alerts at all.

Alert systems that are designed to pick up every instance of certain words being used will do this regardless of context. For example, an alert for “wash” (as in “wash trades”) could also be triggered by references to Washington or someone talking about dishwashing. An alert for “fix” or “fixing” could also pick up conversations about DIY or fixing dinner. And “churn” could just trigger alerts over a trader talking about clients leaving.


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