The document discusses key aspects of secondary markets. It defines secondary markets as markets where securities are traded after being initially offered to the public in primary markets. The majority of trading occurs in secondary markets, which comprise equity and debt markets. Secondary markets offer both sellers and buyers advantages, such as sellers recouping a portion of the original purchase price, though they can also reduce sales for original sellers. Key products traded in secondary markets include equity shares, government securities, debentures, and bonds.