RE:Ygr outperformed IPOOne way to break the shorts is to remove their ability to borrow stock . They borrow stock from either brokers that lend stock out of margin accounts ( yours and mine etc.) as this is in the fine print of margin agreement forms that they are permitted to do this ------which they charge fees that they pocket. Or they borrow from institutional accounts who generally would lend through their custodian. As the custodians usually do the grunt work they receive part of the fees. In YGRs case it may have few institutional holders leaving margin accounts as the primary borrowing source . This could be blocked or the shorts could have the shares recalled by the owner if 1. they register the shares in their name or what is likely cheaper is simply move the shares to a cash account from their margin account . Shares in registered accounts cannot be lent out .