بورس های اوراق بهادار به عنوان نبض اقتصاد جامعه مطرح هستند. داشتن بورس پویا و رو به رشد به توسعه اقتصادی کشور کمک شایانی می نماید. بورس های اوراق بهادار از دو بعد داخلی و بین المللی قابل بررسی می باشند. اثرات اخبار خوب و بد داخلی و شوک ها و نوسانات جهانی ازجمله عوامل مؤثر بر نرخ بازدهی شاخص قیمت بورس اوراق بهادار می باشد. در این مطالعه با استفاده از اطلاعات شاخص بورس های تهران، استانبول و دوبی ...

The objective of this research is to model the behavior oil returns. volatility returns described through a TGARCH process. Conditional probability jumps are incorporated uniform, double exponential and normal jump intensity distributions. We found that follows stylized facts leptokurtosis, leverage effect clustering. abnormal information causes jumps, can cause another type unexpected changes ...

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...

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...

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...

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 ...

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....

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...

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...