Temat: Market efficiency - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Analysis of selected seasonality effects in market of barley, canola, rough rice, soybean oil and soybean meal future contracts
Autorzy:: Borowski, Krzysztof
Powiązania:: https://bibliotekanauki.pl/articles/522318.pdf
Data publikacji:: 2015
Wydawca:: Uniwersytet Ekonomiczny w Katowicach
Tematy:: Calendar effects
Commodity market
Market efficiency
Opis:: Likely to the equity market, the problem of anomalies in the commodities market is becoming an interesting phenomenon, particularly in the segment of the agricultural market. This paper tests the hypothesis of daily, the day-of-the week, the first and the second half of monthly effects on the market of futures contract of: barley, canola, rough rice, soybean oil and soybean meal, quoted in the period of 12.12.2006-31.06.2015 (barley) and 01.09.1998-31.06.2015 (the other commodities). Calculations presented in this paper indicate the existence of monthly effect: in September (canola), February and September (soybean oil) and July, September and October (soybean meal) as well as the day-of-the-week effect: on Tuesdays (canola) and on Thursdays (rough rice). The seasonal effects were also observed in the case of testing the statistical hypothesis for daily averaged rates of return for different days of the month: 4th (barley), 12th (canola), 5th (rough rice) and 9th (soybean oil and soybean meal). The seasonal effects were no registered for the daily average rates of return in the first and in the second half of the month.
Źródło:: Journal of Economics and Management; 2015, 21; 73-89
1732-1948
Pojawia się w:: Journal of Economics and Management
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Labor market efficiency as one of the pillars of the global competitiveness of an economy – conclusions for the labor market regimes of the EU countries
Autorzy:: Ostoj, Izabela
Powiązania:: https://bibliotekanauki.pl/articles/522236.pdf
Data publikacji:: 2015
Wydawca:: Uniwersytet Ekonomiczny w Katowicach
Tematy:: Global competitiveness
Labor market efficiency
Labor market regime
Opis:: Labor market activity may have an effect on global economy competitiveness. This issue has been described as “labor market efficiency” (LME), which is a constituent of The Global Competitiveness Index published by The World Economic Forum (WEF). The article’s purpose is to clarify the phenomenon of LME and explain the mechanisms which help the constituents affect economy competitiveness. The structure of LME points at the meaning of labor market regime, especially after considering the fact that European Union countries operate within vari ous models of regime. The analysis of the LME diversity may help determine what type of labor market regimes are most efficient in enhancing economy competitiveness.
Źródło:: Journal of Economics and Management; 2015, 20; 80-92
1732-1948
Pojawia się w:: Journal of Economics and Management
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Testing 65 equity indexes for normal distribution of returns
Autorzy:: Borowski, Krzysztof
Powiązania:: https://bibliotekanauki.pl/articles/522104.pdf
Data publikacji:: 2018
Wydawca:: Uniwersytet Ekonomiczny w Katowicach
Tematy:: Capital market efficiency
Distribution of rate of returns
Financial markets
Opis:: Aim/purpose – The primary aim of the paper is to verify the hypothesis on the normal distributions of 65 stock index returns, while the secondary aims are to examine normal distributions for specific years (for six indexes) and for bull and bear markets (for DJIA), demonstrate that the distribution of rates of return for individual indexes can be normal in short time intervals, and then rank analyzed indexes according to the proximity of the distribution of their rates of return to the normal distribution. Design/methodology/approach – The research sample consists of the value of 65 stock indexes from various time intervals. The sample includes both developed markets and emerging markets. The following rates of return were tested for the normality of the rat e of return distribution: close -close, open -open, open -close and overnight, which were calculated for daily, weekly, monthly, quarterly and yearly data. Statistical tests of di f- ferent properties and forces were used: Jarque – Bera (JB), Lilliefors (L), Crame r von Mises (CVM), Watson (W), Anderson – Darling (AD). In the case of six indexes of d e- veloped markets (DJIA, SP500, DAX, CAC40, FTSE250 and NIKKEI225), normality tests of rates distribution were calculated for individual years 2013 -2016 (daily data). In case of the DJIA index, the normality tests of the distribution of returns for individual bull and bear markets were analyzed (daily data, rates of return close -close). In the last part of the paper the analyzed indexes were ranked due to the convergence of their return to normal distribution with the use of the following tests: Jarque – Bera, Shapiro – Wilk and D’Agostino -Pearson. Findings – The distribution of daily and weekly returns of equity indexes is not a normal distribution for all analyzed rates of ret urn. For quarterly and annual data compression the smallest number when there were no reasons to reject the null hypothesis was o b- served for overnight returns compared to close -close, open -close and open -open returns. For the daily, weekly and monthly over night rates of return, the null hypothesis was rejected for all analyzed indexes. The fo llowing general conclusion can be formulated: the higher the data compression (from dail y to yearly), the fewer rejections of H 0 hy- pothesis. The distribution of daily returns can be normal only in given (rather short) time intervals, e.g., particular years or up or do wn waves (bull and bear markets). The posi- tion of the index in the ranking is not depende nt on the date of its first publication, and hence on the number of rates of return possible to calculate for analyzed index, but only on the distribution of its rates of return. Research implications/limitations – The main limitations of the obtained results are different time horizons of each of the analyzed indexes (from the first date in a data base until 30.06.2017). The major part of the retu rns of the analyzed indexes differs from the normal distribution, which question the possi bility of unreflective implementation in practice of economic such models as CAPM and its derivatives, Black–Scholes options valuation, portfolio theory and efficient market hypothesis, especially in long time horizons. Contribution/value/contribution – The contribution of this paper is verification of the statistical hypothesis regarding normal dist ribution of rates of return: (1) other than close-close, i.e. open-open, open-close and ove rnight with the use of various statistical tests, various data compression (daily, w eekly, monthly, quarterly, yearly) for 65 in- dexes, (2) for six stock exchange indexes in each of the years from the period of 2013- 2016 (daily data) and (3) for individual up and down waves for the DJIA index (daily data). In addition, other papers focused only on one or two statistical tests, while five different tests were implemented in this paper. This paper is the first to create a ranking of stock market indexes due to the normal distribution.
Źródło:: Journal of Economics and Management; 2018, 34; 5-38
1732-1948
Pojawia się w:: Journal of Economics and Management
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Do extreme market value ratios mean that the market is informationally inefficient? A study of the Warsaw Stock Exchange
Autorzy:: Karasiński, Jacek
Zduńczak, Patryk
Powiązania:: https://bibliotekanauki.pl/articles/2027261.pdf
Data publikacji:: 2021
Wydawca:: Uniwersytet Ekonomiczny w Katowicach
Tematy:: Efficient market hypothesis
Market value ratios
Random walk
Stock markets
Weak-form efficiency
Opis:: Aim/purpose - The aim of this paper is to verify whether extremely high values of market value ratios are the symptoms of informational inefficiency of the market in a weak form. The authors intend to examine whether these phenomena co-occur with each other. Design/methodology/approach - Following Bachelier's strict random walk model, we quantified a weak-form informational market efficiency with the use of the percentage of normality tests in stock returns run (Expanded Shapiro-Wilk, D'Agostino-Pearson and Jarque-Bera), which indicate that the analyzed distribution is normal (a null hypothesis cannot be rejected). The empirical study was based on the comparison of the market value ratios (P/E and P/BV) and the informational efficiency measure at the level of particular companies, listed on the Main Market and NewConnect of the Warsaw Stock Exchange, and grouped into eight sectors. In order to do this, we analyzed scatterplots, descriptive statistics, Pearson's and Spearman's rank correlation coefficients. The dataset covered 214 companies (based on the assumptions made) in the period from 2016, December 31 to 2020, March 23. Findings - Results obtained indicated that, in most cases, the extremely high values of market value ratios did not co-occur with market inefficiency. Hence, the outstandingly high market value ratios do not have to be the symptoms of market inefficiency. Research implications/limitations - Following a common belief shared in the industry, but still not examined yet, this study examines the possible co-occurrence of extremely high market valuation and market inefficiency, but does not exploit it fully. The authors encourage other researchers, especially, to apply other market value ratios and to come up with their own ideas for market efficiency proxies. What is more, this study has been conducted on a relatively small market, thus the conclusions drawn from the study on the WSE should be tested on other, more developed markets. Originality/value/contribution - According to the authors' knowledge, this study is one of the first trying to examine if the extremely high market value ratios are the symptoms of the informational inefficiency of the market.
Źródło:: Journal of Economics and Management; 2021, 43; 206-224
1732-1948
Pojawia się w:: Journal of Economics and Management
Dostawca treści:: Biblioteka Nauki

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