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      • UT - Faculty of Economics and Management
      • UT - Syariah Economic
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      Analisis Connectedness Indeks Saham Konvensional dengan Indeks Saham Syariah di Indonesia: Pendekatan Spillover Diebold-Yilmaz

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      Date
      2026
      Author
      Dudon, Alban Odidante
      Wiliasih, Ranti
      Muthohharoh, Marhamah
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      Abstract
      PPasar saham syariah dan konvensional kerap diperlakukan sebagai dua segmen yang berbeda, padahal keduanya berada dalam lingkungan informasi yang sama dan dapat saling terhubung kuat pada periode tekanan pasar. Penelitian ini menganalisis connectedness dan spillover volatilitas antara indeks konvensional Indonesia (IHSG, LQ45) dan indeks syariah (ISSI, JII70) menggunakan kerangka VAR dan pendekatan spillover Diebold-Yilmaz. Hasil menunjukkan tingkat connectedness agregat berada pada level tinggi dan bersifat time-varying, yakni menguat saat ketidakpastian meningkat dan melemah ketika pasar lebih stabil. Arah transmisi volatilitas juga berubah mengikuti waktu dan tidak selalu simetris. Indeks acuan pasar lebih sering menjadi penyalur volatilitas, sedangkan indeks konvensional saham unggulan cenderung menjadi penerima bersih. Indeks syariah berada pada posisi yang lebih moderat. Temuan ini menunjukkan bahwa pemisahan melalui sharia screening tidak selalu tercermin penuh pada dinamika pasar sekunder, sehingga pemantauan connectedness yang dinamis relevan untuk penguatan pengawasan stabilitas pasar dan evaluasi kebijakan pasar saham syariah
       
      Islamic and conventional stock segments are often treated as distinct, yet they share the same information environment and can become strongly connected during market stress. This study examines connectedness and volatility spillovers between Indonesia’s conventional indices (IHSG, LQ45) and Islamic indices (ISSI, JII70) using a VAR framework and the Diebold-Yilmaz spillover approach. The results show high aggregate connectedness that is time-varying, strengthening in turbulent episodes and weakening in calmer periods. Spillover directions also shift over time and are not always symmetric. The market benchmark more often acts as a volatility transmitter, while the blue-chip conventional index tends to be a net receiver. Islamic indices play a more moderate role. These findings suggest that segmentation through sharia screening is not always fully reflected in secondary-market dynamics, so monitoring time-varying connectedness can support market stability surveillance and policy evaluation for Islamic equity screening.
       
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      http://repository.ipb.ac.id/handle/123456789/172488
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      • UT - Syariah Economic [567]

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      Copyright © 2020 Library of IPB University
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      Indonesia DSpace Group 
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