[Haskell-cafe] why are trading/banking industries seriously adopting FPLs???

Hello, I am very curious about the readiness of trading and banking industries to adopt FPLs like Haskell: http://talenteze.catsone.com/careers/index.php?m=portal&a=details&jobOrderID=466095.... I currently work in the computer security(intrusion detection). My colleagues are totally ignorant concerning the foundations/motivations of FPLs. (Ironically http://www.galois.com participates in the computer security arena!). Why are are trading/banking diving into FPLs? Regards, Vasili