If so, why didn’t they try to improve them to avoid future disasters? For example, why did UBS fail to learn the lessons of the billion-dollar losses at Société Générale and Barings? It remains to be...

If so, why didn’t they try to improve them to avoid future disasters? For example, why did UBS fail to learn the lessons of the billion-dollar losses at Société Générale and Barings? It remains to be seen if another rogue traders pop up in the near future. Chances are that they will.