Functional programming in Wall Street

The latest issue of Monad.Reader (a electronic magazine about Haskell) includes an interesting article about Jane Street Capital (a Wall Street trading company) and its use of OCaml. The author points good and bad things about the language; these aren't new, in fact the things pointed are well-known by the community, but it's good to hear them from someone using the language in a production setting.

Anyway, it's a case of large-scale adoption -- in the sense of using it as the main language for all development -- of a functional programming language, which is still rare, unfortunately.