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    Wyświetlanie 1-5 z 5
    Tytuł:
    Asymmetric Response to Oil Price and Dynamic Covariation between Exchange Rate and Stock Price: Evidence from China
    Autorzy:
    Ahmed, Nazeer
    Dingchou, Ma
    Onodje, Patrick
    Powiązania:
    https://bibliotekanauki.pl/articles/1193400.pdf
    Data publikacji:
    2021
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Asymmetric Effects
    MGARCH
    NARDL
    Spillover effects
    Structural Breaks
    Opis:
    This paper's purpose is to test for asymmetry in the effect of oil price on China's exchange rate and stock price in the presence of structural breaks. It also sought to examine if dynamic covariation and volatility spillover exists between the exchange rate and stock price. We utilized weekly time series data on Brent and WTI prices, the USD-RMB exchange rate, and Shanghai composite index ranging from 2005-07-19 to 2020-09-22. We applied the Nonlinear ARDL for asymmetry tests and the BEKK-GARCH and DCC-GARCH for volatility spilloever analysis. Our methodology also accounts for possible breaks in the time paths of exchange rate and stock price that are likely to influence cointegration. The results show that oil price has asymmetric effects on exchange rate in the long-run only and on stock price in the short-run only. We also find that oil price cointegrates significantly with exchange rate and stock price only when structural breaks in the data are accounted for. The multivariate GARCH analyses provide no evidence of spillovers between exchange rate and stock prices but the DCC estimates showed evidence of dynamic correlation between both. Although several other studies have researched the nexus among the three variables for China, none, to the best of our knowledge, has explicitly tested for short-run and long-run asymmetries in the effect of oil price on exchange rate and stock market jointly. The paper's main contribution is the evaluation of asymmetry in oil price's effects on both markets vis-à-vis the theory while accounting for structural breaks.
    Źródło:
    World Scientific News; 2021, 156; 62-86
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Has the pandemic changed the relationships between fintechs and banks?
    Autorzy:
    Będowska-Sójka, Barbara
    Kliber, Agata
    Laidroo, Laivi
    Powiązania:
    https://bibliotekanauki.pl/articles/27315315.pdf
    Data publikacji:
    2023
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    fintech
    banks
    COVID-19
    cumulative return
    MGARCH model
    quantile coherency
    Opis:
    We examine the impact of COVID-19 on the banking and fintech sectors based on the relationships of the respective stock indices from December 2017 to April 2022. We analyse dynamic correlations within multivariate GARCH models and relationships in tails with the quantile coherency approach. Returns of fintech and banks dropped simultaneously at the beginning of the pandemic, but the analysis of cumulative returns and draw-downs reveals that the former recovered faster. Banks and fintechs experienced sharp declines together and fintech experienced extreme growth during the downfalls in the banking sector. However, the latter relationship disappears when we analyze only the banks from the USA and Eurozone. Thus, integrating with fintech may be especially beneficial for banks outside those regions. The ability of fintech to resurface and continue to grow demonstrates its importance in the financial system and confirms the shift toward a digital economy in financial markets.
    Źródło:
    Operations Research and Decisions; 2023, 33, 4; 15--33
    2081-8858
    2391-6060
    Pojawia się w:
    Operations Research and Decisions
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hybrid MSV-MGARCH Models - General Remarks and the GMSF-SBEKK Specification
    Autorzy:
    Osiewalski, Jacek
    Osiewalski, Krzysztof
    Powiązania:
    https://bibliotekanauki.pl/articles/2076468.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Bayesian econometrics
    multivariate volatility models
    MGARCH processes
    MSV processes
    financial markets
    commodity markets
    Opis:
    The first so-called hybrid MSV-MGARCH models were characterized by the conditional covariance matrix that was a product of a univariate latent process and a matrix with a simple MGARCH structure (Engle’s DCC or scalar BEKK). The aim was to parsimoniously describe volatility of a large group of assets. The proposed hybrid models, similarly as pure MSV specifications (and other models based on latent processes), required the Bayesian approach equipped with efficient MCMC simulation tools. The numerical effort has payed – the hybrid models seem particularly useful due to their good fit and ability to jointly cope with large portfolios. In particular, the simplest hybrid, now called the MSF-SBEKK model, has been successfully used in many applications. However, one latent process may be insufficient in the case of a highly heterogeneous portfolio. Thus, in this study we discuss a general hybrid MSV-MGARCH model structure, showing its basic characteristics that explain greater flexibility of such hybrid structure with respect to the corresponding MGARCH class. From the empirical perspective, we advocate the GMSF-SBEKK specification, which uses as many latent processes as there are relatively homogeneous groups of assets. We present full Bayesian inference for such models, with the use of an efficient MCMC simulation strategy. The approach is used to jointly model volatility on very different markets. Joint modelling is formally compared to individual modelling of volatility on each market.
    Źródło:
    Central European Journal of Economic Modelling and Econometrics; 2016, 4; 241-271
    2080-0886
    2080-119X
    Pojawia się w:
    Central European Journal of Economic Modelling and Econometrics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Missing observations in daily returns - Bayesian inference within the MSF-SBEKK model
    Autorzy:
    Osiewalski, Krzysztof
    Osiewalski, Jacek
    Powiązania:
    https://bibliotekanauki.pl/articles/483257.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Bayesian econometrics
    hybrid MGARCH-MSV processes
    forecasting unavailable data
    financial markets
    commodity markets
    Opis:
    Often daily prices on different markets are not all observable. The question is whether we should exclude from modelling the days with prices not available on all markets (thus loosing some information and implicitly modifying the time axis) or somehow complete the missing (non-existing) prices. In order to compare the effects of each of two ways of dealing with partly available data, one should consider formal procedures of replacing the unavailable prices by their appropriate predictions. We propose a fully Bayesian approach, which amounts to obtaining the marginal posterior (or predictive) distribution for any particular day in question. This procedure takes into account uncertainty on missing prices and can be used to check validity of informal ways of "completing" the data (e.g. linear interpolation). We use the MSF-SBEKK structure, the simplest among hybrid MSV-MGARCH models, which can parsimoniously describe volatility of a large number of prices or indices. In order to conduct Bayesian inference, the conditional posterior distributions for all unknown quantities are derived and the Gibbs sampler (with Metropolis-Hastings steps) is designed. Our approach is applied to daily prices from six different financial and commodity markets; the data cover the period from December 21, 2005 till September 30, 2011, so the time of the global financial crisis is included. We compare inferences (on individual parameters, conditional correlation coefficients and volatilities), obtained in the cases where unavailable observations are either deleted or forecasted.
    Źródło:
    Central European Journal of Economic Modelling and Econometrics; 2012, 4, 3; 169-197
    2080-0886
    2080-119X
    Pojawia się w:
    Central European Journal of Economic Modelling and Econometrics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Long-Run Relationship between Daily Prices on Two Markets: The Bayesian VAR(2)–MSF-SBEKK Model
    Autorzy:
    Osiewalski, Krzysztof
    Osiewalski, Jacek
    Powiązania:
    https://bibliotekanauki.pl/articles/483271.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Bayesian econometrics
    vector error correction model
    hybrid MGARCH-MSV processes
    financial markets
    commodity markets
    Opis:
    We develop a fully Bayesian framework for analysis and comparison of two competing approaches to modelling daily prices on different markets. The first approach, prevailing in financial econometrics, amounts to assuming that logarithms of prices behave like a multivariate random walk; this approach describes logarithmic returns most often by the VAR(1) model with MGARCH (or sometimes MSV) disturbances. In the second approach, considered here, it is assumed that daily price levels are linked together and, thus, the error correction term is added to the usual VAR(1)–MGARCH or VAR(1)–MSV model for logarithmic returns, leading to a reduced rank VAR(2) specification for logarithms of prices. The model proposed in the paper uses a hybrid MSVMGARCH structure for VAR(2) disturbances. In order to keep cointegration modelling as simple as possible, we restrict to the case of two prices representing two different markets. The aim of the paper is to show how to check if a long-run relationship between daily prices exists and whether taking it into account influences our inference on volatility and short-run relations between returns on different markets. In the empirical example the daily values of the S&P500 index and the WTI oil price in the period 19.12.2005 – 30.09.2011 are jointly modelled. It is shown that, although the logarithms of the values of S&P500 and WTI oil price seem to be cointegrated, neglecting the error correction term leads to practically the same conclusions on volatility and conditional correlation as keeping it in the model.
    Źródło:
    Central European Journal of Economic Modelling and Econometrics; 2013, 5, 1; 65-83
    2080-0886
    2080-119X
    Pojawia się w:
    Central European Journal of Economic Modelling and Econometrics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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