[eitally]

But also in general, in places like that there is also a huge priority placed on having absolutely the best infrastructure & systems reasonably affordable in order to empower the traders. For example, of Fidelity's ~45,000 employees, about 14,000 work in technology roles (both internal IT and product stuff). To me that's an insane ratio for a non-tech company ...

... but, if you talk to any big-finance leaders these days, they'll probably admit to you that their tech is their competitive advantage (and not just in HFT, either).