Elon,
With all due respect. You sell cars you do not own when you take good faith deposits for delivery later in the year.
You are "short" vehicles until they are delivered.
If your supply chain for raw material stock is cut, you would be in default of delivery. A Short Squeeze.
Magazine subscriptions are a "short" of the publisher to the "long" who is expecting delivery for their Miss August issue of Playboy.
If their paper supply is cut, they would be in default. …with a different sort of "Squeeze"
Shorting stocks up to, and limited to the amount of outstanding shares should be allowed. imho
Sincerely,
420Anon