The aim of the research is to verify the hypothesis of the weak form of efficiency of the Polish capital market. The research is conducted for the WIG20 index and subindexes constructed for sectors on the basis of quotations of companies that are included in the WIG20 index. In the paper, the Quenouille's test for autocorrelation coefficients, runs test and unit root test have been used. The research covers the period from 3.01.2000 to 29.12.2006.
Financed by the National Centre for Research and Development under grant No. SP/I/1/77065/10 by the strategic scientific research and experimental development program:
SYNAT - “Interdisciplinary System for Interactive Scientific and Scientific-Technical Information”.