Hi Mark, I just got myself into a big mess: I copied and pasted an investment from one portfolio to another but now, as you wrote, 'If you make an edit in that investment, it is reflected everywhere that investment is located'. How do I decouple the 2 investments ? If I erase the new one the old one will get erased as well.
Once this problem is solved I will use Create New Investment from Existing in the File menu to create the same investment in the other portfolio without the original transactions.