buy-in or sell out

Buy-in occurs when buyer issues a notice to the seller that unless the shares are delivered by a specified date, thn a buy-in will be executed whereby the buyer will purchase the share from another counterpaty at the market price and any losses occurs to the buyer will be paid by the seller. This means that even if original trade is dead, the seller still has to pay for any loss occurring to buyer.

Sell-out occurs when the seller of shares issues a notice to the buyer that unless the cash is paid by a specified date, the seller may sell shares to some other counter-party at the market price and any loss occuring to the seller will be paid by the buyer.