Who knows what when? The information content of pre-IPO market prices

To resolve the IPO underpricing puzzle it is essential to analyze who knows what when during the issuing process. In Germany, broker-dealers make a market in IPOs that starts as soon as the offer range is published. We examine these pre-IPO prices and find that they are highly informative. They are closer to the first price subsequently established on the exchange than both the midpoint of the offer range and the offer price. The pre-IPO prices explain a large part of the underpricing left unexplained by other variables. The results imply that information asymmetries are much lower than the observed variance of underpricing suggests. They cast doubt on the informational role of bookbuilding and the relevance of the winner's curse problem.