No, it won't! You do not need to maintain a minimum balance in your cash account for it to remain open.
However, if you do not have any holdings or cash in your trading account, we may contact you via email to confirm that you still wish to have an account with us. If we do not hear back from you, then your trading account may be closed.
What if my trading account has already been closed due to inactivity?
If your trading account has been closed due to inactivity and you wish to begin trading again, you can get back up and running by submitting a new trading account application. There are no fees associated with this, and for most account types the process can be completed in 5-10 minutes.