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      Analisis Pengaruh Return Nikel dan Return Emas terhadap Return Saham PT Vale Indonesia Tbk Menggunakan Regresi Berbasis Copula

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      Date
      2022
      Author
      Lestianto, Angga Jian
      Budiarti, Retno
      Purnaba, I Gusti Putu
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      Abstract
      Komoditas nikel dan emas mengalami pertumbuhan harga yang signifikan selama pandemi Covid-19. Pertumbuhan harga nikel dan emas ini tentunya dapat memengaruhi pergerakan harga saham PT Vale Indonesia Tbk, selaku perusahaan penghasil nikel dan emas. Dalam karya ilmiah ini, hubungan yang melibatkan ketiga peubah tersebut dimodelkan dengan regresi berbasis copula. Regresi berbasis copula lebih fleksibel dibandingkan dengan regresi Ordinary Least Square (OLS) dalam menganalisis pengaruh antar peubah karena regresi berbasis copula tidak memerlukan asumsi-asumsi seperti pada regresi OLS. Dalam model regresi dengan peubah penjelas lebih dari satu, hubungan antar peubah penjelas perlu dipertimbangkan pengaruhnya terhadap hasil dugaan regresi berbasis copula. Data yang digunakan adalah data return mingguan nikel berjangka dunia (NICKEL), emas dunia (XAU), dan saham PT Vale Indonesia Tbk (INCO) pada periode Mei 2020 – Desember 2021. Hasil menunjukkan bahwa return NICKEL memiliki pengaruh positif yang kuat terhadap return INCO, sedangkan return XAU memiliki pengaruh positif yang lemah terhadap return INCO. Selain itu, model regresi copula dengan asumsi peubah penjelas tidak saling bebas memiliki hasil dugaan yang lebih baik dibandingkan dengan model regresi copula dengan asumsi peubah penjelas saling bebas.
       
      Nickel and gold commodities experienced significant price growth during the Covid-19 pandemic. This growth in nickel and gold prices can certainly affect the stock price movement of PT Vale Indonesia Tbk, as a nickel and gold producer. In this paper, the relationship involving the three variables is modeled by copula-based regression. Copula-based regression is more flexible than Ordinary Least Square (OLS) regression in analyzing the effect between variables because copula-based regression does not require assumptions as in OLS regression. In a regression model with more than one independent variable, the relationship between the independent variables needs to be considered for its effect on the copula-based regression estimation result. The data used is weekly return data of world nickel futures (NICKEL), world gold (XAU), and PT Vale Indonesia Tbk (INCO) shares for the period May 2020 – December 2021. The results show that NICKEL returns have a strong positive effect on INCO returns, while XAU returns have a weak positive effect on INCO returns. In addition, the copula-based regression model with the assumption that the independent variables are not independent has better estimation results than the copula-based regression model with the assumption that the independent variables are independent.
       
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      http://repository.ipb.ac.id/handle/123456789/112356
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