What is a 'Buy-In'
A buy-in is when an investor is forced to repurchase shares because the seller did not deliver the securities in a timely fashion, or did not deliver them at all.
BREAKING DOWN 'Buy-In'
Those who fail to deliver the securities will be notified with a buy-in notice. Failure to answer the buy-in notice means the broker can buy the securities and deliver them on your behalf. You must then pay back the broker at whatever price.