An IPO's performance can be measured in a variety of ways, including the stock's opening price on the first day of trading, the price change from the offering price, and the stock's overall return over a given time period. A successful IPO is one in which the share price rises immediately following the offering and continues to rise over time.
An IPO's success is determined not only by its initial price, but also by its ability to maintain or increase in market value over time. The characteristics of a company's performance, industry trends, and market conditions all have an impact on IPO results.