If I click "move/copy question to another bank", the dialog box has a check box so I can "Keep a copy in this question bank as well".
If I click "Move Multiple Questions", there is no copy option available. The dialog box is entitled "Move/Copy Questions", but all you can do is move questions.
I make duplicate questions that I make small changes to so I can have similar questions without having to completely remake them. (e.g. I turn a true statement into a false statement to have 2 True/False questions to choose from.)
I can do this by making the question in a bank. Then, in the quiz, I repeatedly click "Find Questions" and select the original question as many times as I want similar questions. This is tedious.
I can do it within the question banks by moving the question to another bank while keeping a copy. Then I go to the other bank and move the question back. This is a little better.
For a single question, either of these is acceptable. For multiple questions, however, all that clicking and loading can add up. I can duplicate several problems at once by sharing a quiz to commons and importing it back, which puts the questions in a new bank. This feels like using an elephant gun on a rabbit, though.
It would be nice to be able to have a copy option in the move multiple questions action. It would be even better to have a "Copy this Question" button right next to the "Edit this Question" button.