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The stock market indexes in research on human balance

Wodarski Piotr, Chmura Marta, Gruszka Grzegorz, Romanek Justyna, Jurkojć Jacek

Acta of Bioengineering and Biomechanics

2022

Vol. 24, no. 2

163--176

The aim of the study was to demonstrate the possibility of using stock exchange indices to assess the ability to maintain balance as a supplement to analyzes using values determined in the time and frequency domains. Methods: 83 healthy people (56 females, 27 males, age years 21 SD = 1.3 years) participated in the research. Measurements were performed with open and closed eyes and in the virtual environment with two sceneries oscillating at four frequencies. The results determined in the time and frequency domains were analyzed in relation to the results calculated with the use of stock exchange indicators for which the Trend Change Index was formulated. Performed measurements made it possible to determine the average COP speed, the average COP speed and range of movement towards AP, power spectral density PSD and stock exchange indices. Results: In the case of PSD values for the ranges above and below 0.5 Hz, statistically significant differences occurred for most measurements. Obtained values of TCI coefficient were similar and no statistically significant differences were observed. The maximum values of the PSD medians were obtained in trials with the oscillating scenery. Conclusions: Conducted analyzes showed that use of stock exchange indicators broadens the interpretative possibilities of COP measurements by determining the number of consecutive skips (changes in the direction) of the COP and prioritizing according to the times between them. The applied stock market analysis methods also filtered out changes in the position resulting from noises that could not be removed with the use of standard low-pass filters.

Corporate reputation and assessment of companies by the capital market: evidence from the Polish banking sector

Nawrocki Tomasz, Szwajca Danuta

Organizacja i Zarządzanie : kwartalnik naukowy

2019

nr 3

111--124

The importance of reputation in achieving a competitive advantage and creating a company’s value is noticed by both theorists and practitioners of management. However, the relationship between the level of corporate reputation and a company’s investment characteristics, which determine their investment attractiveness, still has not been systematically and comprehensively verified. The variety of previously used methods for assessing and measuring corporate reputation means that the results are not quite reliable and cannot be used for intra-sectoral, cross-sectoral and over time comparisons and makes it difficult — or even impossible — to examine the relevant relationship between reputation and market value or the investment risk of different entities. Therefore, the main purpose of the paper is to attempt to determine the relationship between the assessment of companies by the capital market — based on price multipliers — and their reputation, obtained using an original method, based on information reported by companies and the methodology of fuzzy sets. The research is preliminary in nature and was performed on the Polish banking companies listed on the Warsaw Stock Exchange in the period of 2007-2018.