NorthWest Biotherapeutics Inc (NWBO)

[ou71764]

The broker who is custodian over the shares in your account is the only party that needs to worry about naked shorting. The broker has a fiduciary responsibility for your shares and cannot suddenly say that you're out of luck since they weren't authorized.

Assuming there are shares that were created through naked shorting, they aren't in Schwab, Fidelity or any other legitimate brokerage account. They're in some small brokerage house, with a Bernie Madoff character involved.

Just make sure you're with a legitimate broker and that your account has SIPC protection. If your account is bigger than the SIPC limit, open multiple accounts with different brokers.