[Solved] What is the difference between writing a covered call and writing a naked call? Which one is riskier? Why? Standby Underwriting: Agreement where the underwriter agrees to purchase the unsubscribed portion of the issue. Unsubscribed Portion: The part of a new security issue that is not sold or not taken up by investors during an offering period. Standby Underwriting Agreement: This is a commitment by an underwriter to purchase any unsold shares in a public offering, ensuring the issuing company raises the full amount of capital sought. Lockup Agreement: A contractual clause preventing company insiders, such as employees and investors, from selling their shares for a certain period following an initial public offering (IPO).