Islamic financial instruments have been experiencing rapid growth in the last 50 years. Despite unique motivation formulating them, namely based on Syariah law, their movement might link to those of conventional ones. This paper is devoted investigating such interactions. It does so by applying two multivariate time series models estimate various instruments, both and The are VAR (Vector Autore...

Investasi adalah sebuah komitmen dalam menanamkan sejumlah dana pada periode tertentu untuk mendapatkan keuntungan di masa yang akan datang. saham menjadi sasaran para investor karena (return) diperoleh relatif tinggi. Namun, return tinggi memiliki risiko pula. Pergerakan dari lain juga dapat mempengaruhi besar didapatkan. Sehingga, diperlukan analisis mengetahui seberapa suatu dan melihat peng...

This paper examines the hedging effectiveness of gold futures for the stock market in minimizing variance and downside risks, including value at risk and expected shortfall using data from the Iran emerging capital market during four different sub-periods from December 2008 to August 2018. We employ dynamic conditional correlation models including VARMA-BGARCH (DCC, ADCC, BEKK, and ABEKK) and c...

This paper investigates the conditional correlations and volatility spillovers between the dollar exchange rate return, gold coin return and crude oil return to stock index return. Monthly returns in the 144 observations (2005 - 2017) are analyzed by constant conditional correlation, dynamic conditional correlation, VARMA-GARCH and VARMA-AGARCH models. So this paper presents interdependences in...

Two new species of Varma Distant, 1906, V. falcata Chang & Chen, sp. n. (China: Guizhou) and V. lobata Chang & Chen, sp. n. (China: Guizhou) are described and illustrated. The female genitalia of four speices including two known species are described and illustrated for the first time. The diagnostic characters of this genus are redefined. A checklist to the species of Varma in China is given. ...

We develop and apply a method, called weighted-covariance factor decomposition (WCD), for reducing large estimated vector autoregressive moving-average (VARMA) data models of many "important" and "unimportant" variables to smaller VARMAfactor models of "important" variables and significant factors. WCD has four particularly notable features, compared to frequently used principal components deco...

in this paper rst we dene the notions of positive implicativehyper mv -ideals of types 1,2,3 and 4 in hyper mv -algebras and we investigatethe relationship between of them . then by some examples we show that thesenotions are not equivalent. finally we give some relations between these notionsand the notions of (weak) hyper mv -ideals and (weak) hyper mv -deductivesystems of hyper mv -algebras.