The term "new issue" refers to the first day that a newly registered security can be offered for sale to the public. This is an important concept in finance, as it signifies the beginning of a company's public offering and allows for investors to purchase shares in the company. It is a critical moment for both the company and potential investors, as it sets the tone for the future success of the security. Understanding the significance of the new issue date is essential for any investor looking to make informed decisions in the world of finance.