This article examines the stock market effects of changes in the composition of the TSE300 index over the period 1990-94. The test methodology adjusts for thin trading, pre- and post-revision abnormal performance and sample selection criterion effects. The models used to characterize returns...

The overallotment option (OAO) gives underwriters the right to acquire additional shares from the issuing firm at the offer price (less underwriting fees) in order to meet any excess demand for an issue. Thus, underwriters can use overallotment options to stabilize market prices post-issue by...