Sains Malaysiana 41(10)(2012): 1287–1299
Asymmetry
Dynamic Volatility Forecast Evaluations using Interday and Intraday Data
(Penilaian Peramalan Kemeruapan Dinamik Asimetri dengan Data
Antara dan Dalaman Harian)
Chin Wen Cheong* & Ng Sew Lai
Research
Centre of Mathematical Science, Multimedia University,
63100
Cyberjaya, Selangor, Malaysia
Zaidi
Isa
Pusat
Pengajian Sains Matematik, Fakulti Sains dan Teknologi
Universiti
Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia
Abu
Hassan Shaari Mohd Nor
Fakulti
Pengurusan Perniagaaan, Universiti Kebangsaan Malaysia
43600
UKM Bangi, Selangor, Malaysia
Diserahkan:
27 Oktober 2011 / Diterima: 22 Mei 2012
ABSTRACT
The accuracy of financial time series forecasts often rely on the model precision and the availability of actual
observations for forecast evaluations. This study aimed to tackle these issues
in order to obtain a suitable asymmetric time-varying volatility model that
outperformed in the forecast evaluations based on interday and intraday data.
The model precision was examined based on the most appropriate time-varying
volatility representation under the autoregressive conditional heteroscedascity
framework. For forecast precision, the evaluations were conducted under three
loss functions using the volatility proxies and realized volatility. The
empirical studies were implemented on two major financial markets and the
estimated results are applied in quantifying their market risks. Empirical
results indicated that Zakoian model provided the best in-sample forecasts
whereas DGE on the other hand indicated better out-of-sample
forecasts. For the type of volatility proxy selection, the implementation of
intraday data in the latent volatility indicated significant improvement in all
the time horizon forecasts.
Keyword: ARCH model; dynamic volatility; market
risk; realized volatility
ABSTRAK
Ketepatan ramalan siri masa kewangan sering
bergantung kepada ketepatan dan kewujudan cerapan sebenar dalam penilaian
ramalan. Kajian
ini bertujuan menangani isu-isu tersebut untuk mendapat model kemeruapan
berubah masa asimetri yang dapat memberi prestasi yang baik berdasarkan data
antara dan dalaman harian. Ketepatan model diperiksa
berdasarkan pewakilan kemeruapan berubah masa paling sesuai dengan rangka kerja
autoregresi heteroskedastisiti bersyarat. Untuk
ketepatan peramalan, penilaian peramalan dijalankan berdasarkan tiga fungsi
kerugian dengan proksi kemeruapan dan kemeruapan realisasi. Kajian empirik dilaksanakan pada dua pasaran saham utama dan
keputusan penganggaran digunakan dalam mengkuantitikan risiko pasaran masing-masing. Keputusan empirik menunjukkan model asimetri Zakoian memberi
keputusan penilaian peramalan dalam sampel yang terbaik manakala model DGE pula
menandakan peramalan luar sampel yang paling tepat. Untuk
pemilihan proksi kemeruapan, penggunaan data dalaman harian sebagai kemeruapan
sebenar menunjukkan pembaikan yang signifikan dalam peramalan semua ufuk masa.
Kata kunci: Kemeruapan dinamik; kemeruapan realisasi;
model ARCH; risiko pasaran
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*Pengarang
untuk surat-menyurat; email: wcchin@mmu.edu.my
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