"To open a short position, an investor places a short sale order with their brokerage firm in a stock that the investor does not own. This is done in a margin account."
Praying for people not to have their kids' lives financially ruined. Please no matter what the guy on the other end of the phone says, you DO NOT HAVE TO MISS OUT ON ANYTHING.
Avoid selling $HMBL futures to go down in price in the future or whatever the person on the phone is trying to get you to do to get them off the hook.