Group 1 - Cornerstone investors are officially recognized institutional investors in Hong Kong IPOs, committing to purchase a certain number of shares at the offering price before the IPO starts, enhancing market confidence and stabilizing demand [2][5] - Anchor investors are not officially defined by the Hong Kong Stock Exchange but are large institutional investors who place orders early in the bookbuilding phase, helping underwriters determine pricing and generate market interest [3][6] Group 2 - Cornerstone investors have a mandatory lock-up period of at least 6 months to prevent short-term selling, and their commitments are legally binding [4][5] - Anchor investors typically do not have a mandatory lock-up period, allowing them to trade shares immediately after listing unless otherwise agreed [8][10] Group 3 - Information disclosure for cornerstone investors is mandatory, requiring detailed disclosure in the prospectus, including investor names, subscription amounts, and lock-up periods [5][10] - Disclosure for anchor investors is non-mandatory, depending on the issuer or underwriter's discretion, leading to potential information ambiguity [10][11] Group 4 - The core function of cornerstone investors is to provide credit endorsement and subscription support, which can influence the IPO pricing and reduce the risk of insufficient demand [10][11] - Anchor investors primarily assist in pricing and market preheating, with their early large subscriptions helping underwriters gauge market demand [10][11] Group 5 - Cornerstone investors are typically long-term institutions such as sovereign funds and asset management companies, while anchor investors are often short-term trading institutions like hedge funds [11]