Say that the initial offering is for 10 million shares at $20 a share. Then the price pops to $30. That $30 share price is based on a much smaller net influx of investment. It does not follow that you could have sold 10 million of shares at that price. The $20 price is a discount that is needed to make the market clear a very large number of shares, all at once. Furthermore, the pop to $30 only happened because retail investors know that the institutions buying into the IPO are reputable, long-haul investors like Fidelity, who will not be dumping the stock immediately. So if you don't have Fidelity and other reputable investors putting in money at $20, you will never get the pop to $30. And because of their size and reputation and relationships, institutions like Fidelity will be able to command discounts, like any big buyer can. The IPO-ing company generally needs Fidelity much more Fidelity needs to buy the company's stock. Thus Fidelity can command the discount.
Say that the initial offering is for 10 million shares at $20 a share. Then the price pops to $30. That $30 share price is based on a much smaller net influx of investment. It does not follow that you could have sold 10 million of shares at that price. The $20 price is a discount that is needed to make the market clear a very large number of shares, all at once. Furthermore, the pop to $30 only happened because retail investors know that the institutions buying into the IPO are reputable, long-haul investors like Fidelity, who will not be dumping the stock immediately. So if you don't have Fidelity and other reputable investors putting in money at $20, you will never get the pop to $30. And because of their size and reputation and relationships, institutions like Fidelity will be able to command discounts, like any big buyer can. The IPO-ing company generally needs Fidelity much more Fidelity needs to buy the company's stock. Thus Fidelity can command the discount.