Wirehouse

Don’t worry—a wirehouse isn’t some warehouse with wires that could be used for the set of Saw 12. It’s just a full-service broker-dealer (a financial firm that buys and sells securities, then sells them to customers...like a financial middleman).

Back in the day, “wirehouse” was used more broadly (like by insurance companies), since wirehouse got its name from the fact that firms were wired together via telecommunication networks. Copper wire was like the medium of tech exchange back then. The term stuck with broker-dealers, even though we’re not so wired for wires in the modern era.