If you believe in GFI, the now is the time to buy some more. If it goes even lower, you can then buy some more. If it goes higher, you can buy some more. Listen to Warren Buffet's advice. You haven't lost any money until you (are forced to) sell. If you have borrowed money and used the shares as collateral, then you may be forced to sell and you may lose much more than just the shares. Be careful out there.