I have a question on how to calculate a single IRR for a group of projects that have different start dates, but have been sold on the same date. This causes the aggregate cash flows to go from negative to positive to negative. I have laid out a basic example below:
I have been asked to come up with a single IRR for Project 1 and Project 2. Would I simply add the cash flows to get a pooled IRR or would I weight the individual IRR's based on the original investment and sum those %'s? Alternatively, would an NPV be more appropriate instead of a single IRR?