Seasonal production, weather abnormalities, and high perishability introduce a degree of volatility to potato prices. Price is said be asymmetric when positive negative shocks the same magnitude affect it in dissimilar way. GARCH symmetric model, cannot capture price volatility. EGARCH, APARCH, GJR-GARCH models are popularly used In this paper, an attempt made model weekly wholesale modal potat...

In this paper we analyse the effect of news relating to the expected path of monetary policy on interest rate futures. Central banks’ transparency is in most respects much greater than it was a decade ago, and so central bank communication needs to be included as a potential source of news. We therefore consider four types of news: macroeconomic news, overseas news, monetary policy surprises an...

This paper analyses the asymmetric volatility in Japanese electronics and electrical equipment (hereafter, electronics) patents in the USA from 1975 to 1997. The number of patents has been increasing steadily over time and the electronics industry has a 30% share of total Japanese patents in the USA. Thus, such patents reflect a strategic development by Japanese companies for the US market. The...

A test for time-varying correlation is developed within the framework of a dynamic conditional score (DCS) model for both Gaussian and Student t-distributions. The test may be interpreted as a Lagrange multiplier test and modi…ed to allow for the estimation of models for time-varying volatility in the individual series. Unlike standard moment-based tests, the score-based test statistic includes...

Using DCC-GARCH and EGARCH model, this paper finds that since 1990, the relationship between crude oil prices and the US dollar index is time-varying, demonstrating a process of “very weak correlation—negative correlation—enhanced negative correlation—weakening negative correlation”, but the existing research does not provide enough reasonable explanation. Therefore, this paper proposed a “key ...

With China's continuous opening to the outside world, changes in international environment and operation of cross-border RMB settlement system (CIPS), scale has fluctuated continuously. In response this phenomenon, authors collected sorted out total amount payments from 2011 2020 time sequence data China, then use five AR models including ARMA, GARCH(1.1), EGARCH(1.1), PARCH(1.1), CARCH(1.1) fi...

importance of risk and uncertainty in financial markets became more apparent after financial crisis in 2007. volatility is the most important measure of risk in financial markets. thus, modeling volatility of financial markets is one of the important issues in finance and economics. in this paper first we tried to specify key features of volatility of daily returns of tehran stock exchange pric...