Thank you fanfare for your answer. I was just to trying to figure out where have the disallowed loss been added to the cost basis. I thought I need to do something myself. But anyway, your comment sounded I should trust the Fidelity and not worry about it. I had some back and forth sell, purchase in that few months when we first entered the pandemic. The back and forth made the transactions very complicated I guess, e.g. wash sale after a wash sale. I don't think I will run into the same situation anymore. Just to learn something. My question I asked, e.g. if I sell 100 shares at $50 a share, $10/share loss. After a week, I purchase 20 shares at $30 a share. Will this 20 share purchase trigger the entire 100 share of sell loss a wash sale? Or only 20 shares in that 100 share considered wash sale?
