there is also naked short selling, if I got it right you need to have the stocks within 3 days of the closing date of the short, seems to work most of the time,

there is also naked short selling, if I got it right you need to have the stocks within 3 days of the closing date of the short, seems to work most of the time, the only failure in recent times was when Porsche shorted Volkswagen and and had to pay enormous amounts when the shorts were due (they shorted too much of them and had to buy them at any price to close the deal)