the presence of bubbles in the markets and its formation has been regarded by economists and they have been looking to develop methods that can be recognized by using appropriate method for the formation of bubbles. in this paper, first, the formation of bubbles is tested using the new unit root test known as phillips test (generalized sup adf test) for 50 companies in the tehran stock exchange...

Amid surging market values and widespread regulatory discussion, NFT DeFi markets are widely perceived as being simply speculative in nature. This paper detects the existence dates of price bubbles by applying SADF GSADF tests. We document that both exhibit bubbles, with more recurrent having higher average explosive magnitudes than bubbles. The highly correlated hype general cryptocurrency unc...

Bu çalışmada, Türkiye’de bölgesel sınıflandırmada Kuzeydoğu Anadolu Bölgesi olarak adlandırılan ve Erzurum, Erzincan Bayburt illerini kapsayan TRA1 bölgesi için 2013-2020 yılları arası aylık reel konut fiyat endeksi kullanılarak piyasasında balonunun oluşup oluşmadığı incelenmiştir. SADF GSADF sağ kuyruklu birim kök testlerinin kullanıldığı analiz sonucuna göre çoklu balonları gözlemlenmiştir. ...

Abstract This study applies the generalized sub ADF (GSADF) tests to investigate whether bubbles exist in United States markets over period of 2015-2019, focusing on COVID-19 period. We use daily Dow-Jones stock price indexes for first time during 2015/1/7-2020/3/17. Empirical results demonstrate existence US market some sub-sample periods. Especially important, we find third bubble begins from...

A full-fledged empirical test of the latest methodology in field recursive procedures for identifying and dating market bubbles - GSADF has been performed. The use previous iterations tests did not allow to accurately determine presence a bubble at early stages its formation. results this study prove that using sliding window significantly improves discriminatory ability tests, formation it all...

This paper investigates the presence of speculative bubbles in Scandinavian countries namely Denmark, Finland, Norway, and Sweden over period from 1980Q1 to 2018Q4 searches for evidence bubble migration among those countries. First, we apply GSADF test developed by Phillips et al. (2015) on quarterly housing price-to-rent ratios exuberance episodic bubbles. Subsequently, examine between these m...