The Size Premium on Warsaw Stock Exchange – Sumbeta Approach

Tomasz Słoński , Kamil Skoczylas , Zbigniew Grodziński


The problem of the size premium for small capitalization listed on Warsaw Stock Exchange is the main subject of this paper. We find that abnormal returns from small capitalization stocks are not properly explained by standard CAPM approach. The main thesis is that for small capitalization stocks it takes more time to reflect current information in their prices. Therefore, the additional explanatory variable is return realized in the preceding periods. The results are statistically valid, and the additional variable helps to explain the realized return. The importance of this result is that the size premium defined as the increase of beta coefficient should be applied to majority of Polish public and non-public enterprises.
Author Tomasz Słoński (E&F / DoCFaPF)
Tomasz Słoński,,
- Department of Corporate Finance and Public Finance
, Kamil Skoczylas
Kamil Skoczylas,,
, Zbigniew Grodziński
Zbigniew Grodziński,,
Publication size in sheets0.5
Book Soliman Khalid S. (eds.): Education Excellence and Innovation Management: A 2025 Vision to Sustain Economic Development during Global Challenges, 2020, International Business Information Management Association (IBIMA), ISBN 9780999855141
Keywords in EnglishCAPM, small capitalization companies, beta coefficient, Warsaw Stock Exchange
Languageen angielski
Slonski_T_Skoczylas_K_Grodzinski_Z_The_Size_Premium_on_Warsaw.pdf 118,91 KB
Score (nominal)70
Score sourceconferenceList
Citation count*
Share Share

Get link to the record

* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.