Regardless of who says what or what company reports on this topic - despite their best intentions - how is categorical finality or 100 % proof possible? Could a President of 1 of the Major World Stock Exchanges verify or comment? How does one really know? I still don't think it's possible because major brokerage houses do not wish to reveal it.
Naked shorting should be permanantly banned worldwide & companies engaging in such activities should suffer severe penalties - where it hurts - in the pocketbook. Repeat offences should incur increasing penalties until they get the message once & forall. Multiple offences should lead to Brokerage Houses being shut down. Play by the rules of proper ethical conduct or face the music. There must be consequences or else it will continue indefinitely.