After an IPO has been issued and the price of the stock drops tremendously, the investment banker is to blame since they probably miscalculated the original stock price.
There are many reasons why the stock price could have dropped.

Question

Quizplus · Accepted Answer

While it is possible that the investment banker may have made a mistake in calculating the original stock price, there are many factors that can contribute to a drop in the stock price after an IPO, including market conditions, company performance, and investor sentiment. It is not fair to solely blame the investment banker for a drop in stock price.

After an IPO Has Been Issued and the Price of the Stock