no code implementations • 2 Apr 2024 • Yun-Shi Dai, Peng-Fei Dai, Wei-Xing Zhou
The findings indicate that modeling based on rolling window performs better in describing the overall volatility of the wheat, maize, soybean, and rice markets, and the two-factor models generally exhibit stronger explanatory power in most cases.
no code implementations • 4 Mar 2024 • Han-Yu Zhu, Peng-Fei Dai, Wei-Xing Zhou
Based on these results, decision-makers are advised to safeguard against the price risk of agricultural futures under sudden economic events, and investors can utilize the results to construct a superior investment portfolio by taking different agricultural product futures as risk-leading indicators according to various situations.
no code implementations • 24 Oct 2023 • Wei-Xing Zhou, Yun-Shi Dai, Kiet Tuan Duong, Peng-Fei Dai
The ongoing Russia-Ukraine conflict between two major agricultural powers has posed significant threats and challenges to the global food system and world food security.
no code implementations • 24 Oct 2023 • Yun-Shi Dai, Ngoc Quang Anh Huynh, Qing-Huan Zheng, Wei-Xing Zhou
This paper adopts the random matrix theory (RMT) to analyze the correlation structure of the global agricultural futures market from 2000 to 2020.
no code implementations • 18 Jun 2023 • Li Wang, Xing-Lu Gao, Wei-Xing Zhou
Extensive statistical tests confirm the presence of intrinsic multifractality in the maize and barley sub-indices and the absence of intrinsic multifractality in the wheat and rice sub-indices.
no code implementations • 12 Apr 2023 • Hao-Ran Liu, Wei-Xing Zhou
The average clustering coefficients of the six VGs are quite large (>0. 5) and exhibit a nice power-law relation with respect to the average degrees of the VGs.
no code implementations • 20 Mar 2023 • Yun-Shi Dai, Peng-Fei Dai, Wei-Xing Zhou
This paper combines the Copula-CoVaR approach with the ARMA-GARCH-skewed Student-t model to investigate the tail dependence structure and extreme risk spillover effects between the international agricultural futures and spot markets, taking four main agricultural commodities, namely soybean, maize, wheat, and rice as examples.
no code implementations • 27 Jun 2021 • William A. Barnett, Xue Wang, Hai-Chuan Xu, Wei-Xing Zhou
We derive the default cascade model and the fire-sale spillover model in a unified interdependent framework.
no code implementations • 8 Jun 2021 • Ying-Hui Shao, Yan-Hong Yang, Wei-Xing Zhou
We revisit the dynamic relationship between domestic economic policy uncertainty and stock markets using the symmetric thermal optimal path (TOPS) method.
no code implementations • 25 Jul 2020 • Peng-Fei Dai, Xiong Xiong, Wei-Xing Zhou
For single-factor models, the GEPU index and its changes, as well as realized volatility, are consistent effective factors in predicting the volatility of crude oil futures.
no code implementations • 25 Jul 2020 • Peng-Fei Dai, Xiong Xiong, Wei-Xing Zhou
Uncertainty plays an important role in the global economy.
no code implementations • 29 Oct 2019 • Huai-Long Shi, Wei-Xing Zhou
Using the A-share individual stocks in the Chinese market from January 1997 to December 2017, we first evaluate the performance of the weekly momentum based on raw returns and idiosyncratic returns, respectively.
1 code implementation • 25 Jan 2002 • Wei-Xing Zhou, Didier Sornette
We use this generalized q-analysis to construct a signature called the (H, q)-derivative of discrete scale invariance, which we use to detect the log-periodicity in the energy release rate and its cumulative preceding the rupture of five pressure tanks made of composite carbon-matrix material.
Statistical Mechanics