Ibbotson and Jaffe (1975) discover that the “hot issue” markets are predictable by testing serial correlation of residuals. The first and second month series show the strong serial dependency which means that “hot issue” markets and hot issue
aftermarket can be predicted.
Ibbotson and Jaffe also examine that the high volume of IPO is followed by hot issue market. Therefore, both investors and issuers can forecast the market and know when they should join in the market. However, this phenomenon exists only in
the short run not in the long run.
Ritter (1984) gives the same suggestion of Ibbotson and Jaffe that purchaser ought to purchase when the issues are greatly underpriced. Conversely, issuing firms ought to go public during the high volume of IPO period following a hot issue market since there is less amount left on the table.