The process in which the buying firm must pay for the securities and the selling...

Step by Step Explanation:

Settlement of the Transaction: Refers to the finalization of a trade, where the buyer pays for the securities, and the seller delivers them. For most securities, regular-way settlement occurs T+2 (trade date plus two business days).

Incorrect Options:

Clearing the Trade: Refers to matching trade details to prepare for settlement.

DVP Transactions: A specific type of settlement involving simultaneous payment and delivery, often used for institutional clients.

Corporate Action: Refers to events like stock splits or dividend declarations.

FINRA and SEC Guidelines on Settlement: SEC Settlement Process.