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    Wyświetlanie 1-3 z 3
    Tytuł:
    On portfolio analysis using oriented fuzzy numbers for the trade-related sector of the Warsaw Stock Exchange
    Autorzy:
    Łyczkowska-Hanćkowiak, Anna
    Wójcicka-Wójtowicz, Aleksandra
    Powiązania:
    https://bibliotekanauki.pl/articles/29432380.pdf
    Data publikacji:
    2023
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    oriented fuzzy numbers
    recommendation
    portfolio analysis
    imprecision
    fuzzy discount factor
    Opis:
    Oriented fuzzy numbers are useful in portfolio management since they convey information regarding uncertainty and imprecision when considering financial markets. One may apply a fuzzy discount factor and an imprecise present value in the form of a trapezoidal oriented fuzzy number. An investor can obtain recommendations on individual stocks (buy, sell, accumulate, reduce). Analogous recommendations are also issued by experts. In such cases, recommendations are mostly based on available data and expert’s knowledge and experience. The purpose of the paper is to present a procedure for comparing the accuracy of both types of recommendations. Also, the real impact the recommendations have on potential changes in portfolio composition in trading-related industries is considered. The research uses quotations from companies from the trading sector of the Warsaw Stock Exchange (WSE). Theoretical considerations are presented in the form of an empirical case study.
    Źródło:
    Operations Research and Decisions; 2023, 33, 4; 155--170
    2081-8858
    2391-6060
    Pojawia się w:
    Operations Research and Decisions
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An inventory model for deteriorating items with imperfect quality under advance payment policy
    Autorzy:
    Nath, Biman Kanti
    Sen, Nabendu
    Powiązania:
    https://bibliotekanauki.pl/articles/2100042.pdf
    Data publikacji:
    2021
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    advance payment
    imperfect items
    screening rate
    deterioration
    discount
    price-dependent demand
    Opis:
    In the business world, it is generally observed that the supplier gives a cash discount due to advance payment. The buyer may either pay off the total purchase cost or a fraction of the total purchase cost before receiving the products. If the buyer makes full payment then he receives a cash discount instantly. If the buyer pays a fraction of the total purchase cost, then (s)he receives the cash discount while paying the remaining amount at the time of receiving the lot. Moreover, in most of the inventory models, it is generally assumed that the delivered lot contains only perfect items. But in reality, the presence of imperfect items in the received lot cannot be overlooked as it will affect the total profit of the system. Thus, the study of inventory models considering the presence of imperfect items in the lot makes the model more realistic and it has received much attention from inventory managers. This paper develops a model that jointly considers imperfect quality items and the concept of an advance payment scheme (full and partial). The objective is to determine optimal ordering quantity to maximise the total profit of the system. The necessary theoretical results showing the existence of global maximum is derived. The model is illustrated with the help of numerical examples, and sensitivity analysis is carried out on some important system parameters to see the effects on the total profit of the system. The study shows that a full advance payment scheme is beneficial for the buyer.
    Źródło:
    Operations Research and Decisions; 2021, 31, 3; 109--135
    2081-8858
    2391-6060
    Pojawia się w:
    Operations Research and Decisions
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The portfolio problem with present value modelled by a discrete trapezoidal fuzzy number
    Autorzy:
    Piasecki, K.
    Siwek, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/406597.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    portfolio
    present value
    discrete trapezoidal fuzzy number
    discount factor
    wartość aktualna
    dyskretna liczba rozmyta
    współczynnik dyskontowy
    Opis:
    A multi-asset portfolio in the case of its present value estimated by a discrete trapezoidal fuzzy number has been assessed. The benefits of owning a security have been evaluated according to an expected fuzzy discount factor. The ambiguity risk has been assessed by an energy measure and indistinctness risk has been evaluated by Kosko’s entropy measure. The relationship between the expected fuzzy discount factor for a portfolio and the expected fuzzy discount factors for its components has been derived. An analogous relationship between the values of the energy measure has been presented. The model has been illustrated by means of a profound numerical case study.
    Źródło:
    Operations Research and Decisions; 2018, 28, 1; 57-74
    2081-8858
    2391-6060
    Pojawia się w:
    Operations Research and Decisions
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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