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Archivio digitale delle tesi discusse presso l’Università di Pisa

Tesi etd-09192017-091139


Tipo di tesi
Tesi di laurea magistrale
Autore
BALTAKIENE, MARGARITA
URN
etd-09192017-091139
Titolo
Shareholder behaviour during IPOs of Helsinki Stock Exchange
Dipartimento
INFORMATICA
Corso di studi
INFORMATICA PER L'ECONOMIA E PER L'AZIENDA (BUSINESS INFORMATICS)
Relatori
relatore Prof. Pedreschi, Dino
relatore Prof. Lillo, Fabrizio
relatore Prof. Kanniainen, Juho
controrelatore Prof. Corradini, Andrea
Parole chiave
  • community detection
  • community evolution
  • Helsinki Stock Exchange
  • investor network
  • IPO
  • over-expression
  • SVN
  • under-expression
Data inizio appello
06/10/2017
Consultabilità
Completa
Riassunto
This thesis analyses investor behaviour during the first two years after initial public offerings in Helsinki Stock Exchange. We use statistical validation method to construct investor networks based on co-occurrences of investors' trading actions. We find slightly different trading co-occurrences in the first and the second years. Also, we analyse the topological structure of the networks and we find that the number of small investor communities tends to decrease in the second year. In addition, we discover robust communities with a statistically signi cant investor component that form across multiple securities and persist in time. Rich meta data of the analysed data set enables us to carry out the investor attribute over- and under-representation analysis. Finally, we detect statistically signi cant difference in investor trading behaviour while analysing changes in monthly ownership positions and traded volume across multiple securities.
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