In the world of finance, the concept of settlement refers to the date on which a securities buyer is required to make payment for a purchase, or a seller is obligated to deliver the securities that have been sold. This date typically falls on the third business day after the transaction has taken place. It is crucial for investors to understand and adhere to this timeline in order to ensure smooth and efficient transactions. Failure to meet the settlement date can result in penalties and financial repercussions.