I saw a number of investment houses (mostly sell-side) do this. This was in the age of ESB (Enterprise Service Bus.) The architecture made sense since events (

I saw a number of investment houses (mostly sell-side) do this. This was in the age of ESB (Enterprise Service Bus.) The architecture made sense since events (new trades or quotes) dictate a host of downstream activites, which often need to be near-real-time reduce divergence.