Quote from jerryz:
C++
Visual C++ 6
Visual C++.net
C#
which one do the quants on wall street and hedge funds usually use?
For the largest bond fund we used/use only C++ - not $soft. However some of the systems were based upon the $net/$soft platform but the majority of the mission critical systems that actually run the funds were based upon straight C++ or other systems. The $soft stuff was used on some of the front end systems. In my own operations I used the designs I did for the fund and re-architected portions of hte design - better than the integrations I did at the bond fund - and moved that into strictly open source solutions - with some memory resident databases or the capability to turn this on for heavier loads.