This document discusses listing of securities, book building, and reverse book building. It defines listing as admitting a company's securities to trading on a stock exchange. The major objectives of listing are to provide marketability, negotiability, and protection for shareholders and investors. Book building is a process used in IPOs and FPOs where bids are collected within a price band to determine demand and set the issue price. Reverse book building is used for share buybacks, where bids are taken from current investors to discover a final price above market value.