This paper examines momentum and contrarian effects in the Ukrainian stock market after one-day abnormal returns. To do this, UX futures data over the period 2010–2018 are used. The following hypotheses are tested: H1) hourly returns on overreaction days differ from hourly returns on normal days, H2) there are price patterns on overreaction days, and H3) to test these hypotheses, visual inspection and average analysis are used, as well as t-tests, cumulative abnormal returns, and trading simulation approaches. The results suggest that there are statistically significant differences between intraday dynamics during the usual days and the overreactions day. There is a strong momentum effect present on the day of overreaction: prices tend to change only in the direction of the overreaction during the whole day. The fact of the overreaction becomes clear after 13:00-14:00. This gives a lot of time to explore the momentum effect in the day of overreaction. On the day after the overreaction, prices tend to go in the opposite direction: contrarian pattern is detected, which is in line with the overreaction hypothesis. Based on detected price patterns, rules of trading and trading strategies for the Ukrainian stock market are developed. Momentum Strategy (based on price patterns on the day of overreaction) generates several successful trades; close to with 90%, and their number being is profitable (trading results differ from the random ones – confirmed by t-tests). Contrarian Strategy (based on price patterns on the day after the overreaction) demonstrates low efficiency, and results do not differ from random trading.

Purpose: The article aims to improve the methods of motivation and incentives for employees to ensure the sustainable development of domestic enterprises.   Theoretical framework: The spread of market economy elements in Ukraine determines the link between employee performance and the efficiency of business operations. As a result, the scientific literature shows a constant interest in motivation and incentives. This issue is quite important for enterprises that have a heterogeneous staff structure and are significantly influenced by the technological process, which requires qualified and experienced employees. Therefore, the study of the system of motivation and incentives for employees of domestic enterprises is relevant and essential.   Design/methodology/approach: The methods employed in writing the article were analysis, synthesis, generalization, explanation, and data qualification. The following is proposed to be achieved by considering the factors of influence of the external and internal environment of the enterprise, as well as the specifics of personality development.   Findings: Certain tasks were solved in the course of the study. The theoretical foundations of motivation and stimulation of labor are considered and the peculiarities of the functioning of internal labor demand are emphasized.   Research, Practical & Social implications: Promising measures to improve the performance of the labor force of domestic enterprises are proposed.   Originality/value: The author develops appropriate guidelines for the conformation of the system of motivation and stimulation of labor in society at the present stage of development of profit relations.

This paper explores price effects in the “passion investments” market after days with abnormal returns. To do this, daily prices for stamps and diamonds over the periods 1999–2021 and 1989–2021 are analyzed. The following hypothesis is tested: One-day abnormal returns create stable patterns in price behavior on the next day. Statistic tests (t-test, ANOVA, Mann–Whitney U test, modified cumulative abnormal returns approach, regression analysis with dummy variables) confirm the presence of price patterns related to extreme returns: price fluctuations on the day after extreme returns are higher than returns on “normal” days. On the days after positive abnormal returns, the momentum effect is detected. Contrarian effect is typical for the days after negative abnormal returns. A trading strategy based on detected price effects showed the presence of exploitable profit opportunities. Results of this paper provide additional pieces of evidence in favor of inconsistencies between the efficient market hypothesis and practice and can be used by traders to generate extra profits in the “passion investments” market. Acknowledgment The authors gratefully acknowledge financial support from the Ministry of Education and Science of Ukraine (0121U100473).

Purpose: The article aims to improve the methods of motivation and incentives for employees to ensure the sustainable development of domestic enterprises.   Theoretical framework: The spread of market economy elements in Ukraine determines the link between employee performance and the efficiency of business operations. As a result, the scientific literature shows a constant interest in motivation and incentives. This issue is quite important for enterprises that have a heterogeneous staff structure and are significantly influenced by the technological process, which requires qualified and experienced employees. Therefore, the study of the system of motivation and incentives for employees of domestic enterprises is relevant and essential.   Design/methodology/approach: The methods employed in writing the article were analysis, synthesis, generalization, explanation, and data qualification. The following is proposed to be achieved by considering the factors of influence of the external and internal environment of the enterprise, as well as the specifics of personality development.   Findings: Certain tasks were solved in the course of the study. The theoretical foundations of motivation and stimulation of labor are considered and the peculiarities of the functioning of internal labor demand are emphasized.   Research, Practical & Social implications: Promising measures to improve the performance of the labor force of domestic enterprises are proposed.   Originality/value: The author develops appropriate guidelines for the conformation of the system of motivation and stimulation of labor in society at the present stage of development of profit relations.