Market reactions to changes in the Nasdaq-100 Index membership

We examine stock market reactions around the Nasdaq-100 Index reconstitutions. We find a symmetric and transitory price response accompanied by a significant increase in trading volume on the effective date. Firms added to the Nasdaq-100 Index experience significant increases in institutional ownership, the number of market makers, and the number of shareholders. In contrast, firms removed from the index show significant decreases in the number of institutional shareholders. Additions to the Nasdaq-100 Index also show significant increases in four liquidity measures, whereas deletions demonstrate significant decreases in two liquidity measures. These changes in liquidity are related to the abnormal return on the announcement day. Taken together, the results suggest support for the price pressure, liquidity, and investor awareness hypotheses.

Name thesis:degree_name

M.Sc. Management

Level thesis:degree_level

Masters

Discipline thesis:degree_discipline

Faculty of Business

Department dc:contributor.department

Faculty of Business Programs

Grantor

Brock University

Year dc:date.issued

2012

Author dc:creator

• Xu, Yuanbin

• financial markets
• nasdaq-100 index
• price pressure hypothesis
• investor awareness hypothesis
• liquidity hypothesis

Language dc:language.iso

eng

Handle dc:identifier.uri

http://hdl.handle.net/10464/4006

OAI identifier oai:identifier

oai:brocku.scholaris.ca:10464/4006