Yes sure write me an e-mail in private conversation. I have learned some stress testing models in VAR and have come across some Excel templates for stress simulations. As for ideal software, I don't know if there exists such software focusing on stress-testing, what I meant in customized software was creating your own software in C++ for example which makes it by far flexible than excel if you are using such methods frequently rather than to struggle cell-by-cell in excel.For now it will be just Bond pricing. Please do send me the template, it would be really helpful. What would be the ideal software to use for large amount of data?