Forum Discussion
Excel VBA
You've had over 40 views of your request without a single reply. I can confidently state that the issue here is the lack of a complete description. In order to have IRR or XIRR (which I use in an investment tracking workbook) one needs a series of dates and cash flows. Do you have that? What are the two sheets that are updated monthly? Etc.
Lots of questions that need to be answered; those were just starters. Why do you specify "using excel VBA" for that matter? It's entirely possible that Excel functions and formulas may suffice.
If it wouldn't be violating some proprietary restrictions, you'd also help us help you by posting copies (or mockups) of the various sheets in question, either on GoogleDrive or OneDrive, and then granting access via a link posted here.