I had the misfortune of working for a firm where there were lots of actuaries. Every day the team leader would ask a junior to run his pricing model for a stru

I had the misfortune of working for a firm where there were lots of actuaries. Every day the team leader would ask a junior to run his pricing model for a structured product. The junior would duly press F9 and the macro would commence, with the screen flashing away like a strobe light. 24 hours later the macro would stop and the boss would return to find out the answer, which was usually wrong by an order of magnitude.