نتایج جستجو برای: مدل tgarch

تعداد نتایج: 120035  

Journal: :Uluslararasi Akademik Birikim Dergisi 2023

30 Ocak 2020'de Covid-19, Dünya Sağlık Örgütü tarafından küresel bir sağlık acil durumu ilan edilmiştir. Bu durum hayatın birçok alanında değişikliklere neden olmuştur. Piyasa etkinliğine uygun olmayan, farklılık gösteren sapmalar genel olarak anomali adlandırılmaktadır. Çeşitli anomalilerin varlığı etkin piyasalar hipotezinden olabileceğini göstermektedir. çalışmada finansal yatırım araçlarınd...

2009
Chirag Shah Leonard N. Stern Robert Engle

The extraordinary conditions in the financial world of late 2008 caused severe market dislocations and consequently many asset managers experienced significant portfolio losses, partly due to ineffective hedging techniques. In order to examine the effect of the credit crisis on investment strategies, we create a diverse set of long-short equity portfolios with domestic equity sectors and an arr...

2015
Bing Zhang Xiao-Ming Li Fei He

Utilising a time-varying GAR (1)-TGARCH (1,1) model with different frequency data, we investigate the weak-form efficiency of major global crude oil spot markets in Europe, the US, the UAE and China for the period from December 2001 to August 2013. Our empirical results with weekly data indicate that all four markets have reached efficiency with few brief inefficient periods during the past dec...

Journal: : 2022

Çalışmada, pandemi sürecinin ve özellikle vaka sayılarındaki değişimlerin döviz kurları küresel riskin yerel borsa getirilerine etki ediş sürecine yansımalarının incelenmesi amaçlanmıştır. Bu amaçla kuru VIX endeksine ek olarak aktif vakalar yeni vakaların Türkiye'deki BİST100 hisse senedi endeksi üzerindeki etkileri araştırılmıştır. GARCH, GJR, TGARCH doğrusal olmayan GARCH modellerinden elde ...

Journal: :Journal of Empirical Finance 2021

In this paper we study an extension of the Gram–Charlier (GC) density in Jondeau and Rockinger (2001) which consists a Gallant Nychka (1987) transformation to ensure positivity without parameter restrictions. We derive its parametric properties such as unimodality, cumulative distribution, higher-order moments, truncated closed-form expressions for expected shortfall (ES) lower partial moments....

Journal: : 2022

سابقه و هدف: ورود گونه­­ های ماهی مهاجم دراکوسیستم ­های آبی، سبب بروز انواع اثرات منفی اکولوژیکی اقتصادی-اجتماعی می ­­شود. اولین گام در تجزیه تحلیل مخاطرات ناشی از گونه­ غیر­بومی، شناسایی خطر است بر این اساس ابزارهای متعددی برای ارزیابی خطرات تهاجمی غیربومی به منظور پشتیبانی تصمیم گیرندگان گونه ­­ها ایجاد شده است. هدف پژوهش قدرت تیلاپیای شکم قرمز (Coptodon zillii) حوضه آبریز تالاب شادگان (حوضه‌...

Journal: :Asian Economic and Financial Review 2021

In this study, the volatility of two Asian stock markets, Bursa Malaysia and Singapore Exchange, is estimated. The analysis used data on daily closing prices indices respective markets between July 1, 2019 August 31, 2020. sample split into subsample periods: Pre-COVID-19 pandemic during COVID-19 pandemic. We estimated a standard GARCH, GARCH-M, TGARCH, EGARCH PGARCH model for each subsample. c...

Journal: :International Journal of Finance & Economics 2021

The aim of this article is to choose the appropriate GARCH model analyse volatility dynamics Tunisian sectorial stock market indices during COVID-19 outbreak period. We explore optimal conditional heteroscedasticity with regards goodness-of-fit these indices. In particular, it proposes four models (EGARCH, FIGARCH, FIEGARCH and TGARCH) measure asymmetric persistence volatility. Our findings poi...

Journal: : 2023

در آشکار‌ساز CMS نسبت‌های انشعاب بوزون هیگز مدل استاندارد به جفت‌‌های J/ψ(1S) و cc ترتیب برابر 2-10×1/8 2-10×2/89 اندازه‌گیری شده است. لحاظ نظری یکی از سناریوهای ممکن برای تولید مستقیم این است که آغاز جفت واپاشی نماید سپس مرحله‌ی بعد هر یک کوارک‌های c طور مزون ترکش کنند. بر اساس سناریو مقاله بطریق کوارک‎های با استفاده نظریه اختلال مکانیک کوانتومی رنگ (pQCD) نظر گرفتن حالت‌های قطبش طولی عرضی محا...

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