no code implementations • 16 Feb 2024 • Xiaorui Zuo, Yao-Tsung Chen, Wolfgang Karl Härdle
In the burgeoning realm of cryptocurrency, social media platforms like Twitter have become pivotal in influencing market trends and investor sentiments.
no code implementations • 23 Nov 2023 • Vincent Gurgul, Stefan Lessmann, Wolfgang Karl Härdle
Our findings reveal that incorporating NLP data significantly enhances the forecasting performance of our models.
no code implementations • 28 Dec 2022 • Wolfgang Karl Härdle, Yegor Klochkov, Alla Petukhina, Nikita Zhivotovskiy
Markowitz mean-variance portfolios with sample mean and covariance as input parameters feature numerous issues in practice.
no code implementations • 23 Nov 2022 • Ratmir Miftachov, Georg Keilbar, Wolfgang Karl Härdle
This paper fills the limited statistical understanding of Shapley values as a variable importance measure from a nonparametric (or smoothing) perspective.
no code implementations • 2 Nov 2022 • Wei Li, Wolfgang Karl Härdle, Stefan Lessmann
In addition, we delicately examine the explainability of the CBR system in the decision-making process of bankruptcy prediction.
1 code implementation • 6 Apr 2022 • Bruno Spilak, Wolfgang Karl Härdle
We propose a portfolio allocation method based on risk factor budgeting using convex Nonnegative Matrix Factorization (NMF).
1 code implementation • 23 Nov 2021 • Jovanka Lili Matic, Natalie Packham, Wolfgang Karl Härdle
We study the hedge behaviour and effectiveness for the class of affine jump diffusion models and infinite activity Levy processes.
1 code implementation • 18 Oct 2021 • Danial Saef, Odett Nagy, Sergej Sizov, Wolfgang Karl Härdle
While attention is a predictor for digital asset prices, and jumps in Bitcoin prices are well-known, we know little about its alternatives.
no code implementations • 26 Aug 2021 • Wolfgang Karl Härdle, Rainer Schulz, Taojun Sie
Excessive house price growth was at the heart of the financial crisis in 2007/08.
no code implementations • 26 Aug 2021 • Li Guo, Wolfgang Karl Härdle, Yubo Tao
To investigate these effects, we build a time-varying network for cryptocurrencies, based on the evolution of return cross-predictability and technological similarities.
no code implementations • 12 Aug 2021 • Junjie Hu, Wolfgang Karl Härdle
We uncover networks from news articles to study cross-sectional stock returns.
no code implementations • 23 Mar 2021 • Konstantin Häusler, Wolfgang Karl Härdle
We model the dynamics of the cryptocurrency (CC) asset class via a stochastic volatility with correlated jumps (SVCJ) model with rolling-window parameter estimates.
no code implementations • 16 Mar 2021 • Bingling Wang, Yinxing Li, Wolfgang Karl Härdle
compared to other center based clustering methods, the adaptive $\tau$ cluster centers of pixel data can better capture and describe the features of an image.
1 code implementation • 15 Mar 2021 • Elizaveta Zinovyeva, Raphael C. G. Reule, Wolfgang Karl Härdle
Smart Contracts are commonly considered to be an important component or even a key to many business solutions in an immense variety of sectors and promises to securely increase their individual efficiency in an ever more digitized environment.
no code implementations • 10 Feb 2021 • Souhir Ben Amor, Michael Althof, Wolfgang Karl Härdle
The FRM-EM is applied to capture systemic risk behavior embedded in the returns of the 25 largest EMs FIs, covering the BRIMST (Brazil, Russia, India, Mexico, South Africa, and Turkey), and thereby reflects the financial linkages between these economies.
1 code implementation • 22 Jan 2021 • Kainat Khowaja, Mykhaylo Shcherbatyy, Wolfgang Karl Härdle
Driven by increased complexity of dynamical systems, the solution of system of differential equations through numerical simulation in optimization problems has become computationally expensive.
1 code implementation • 7 Oct 2020 • Bruno Spilak, Wolfgang Karl Härdle
Tail risk protection is in the focus of the financial industry and requires solid mathematical and statistical tools, especially when a trading strategy is derived.
no code implementations • 28 Sep 2020 • Lining Yu, Wolfgang Karl Härdle, Lukas Borke, Thijs Benschop
AI artificial intelligence brings about new quantitative techniques to assess the state of an economy.
no code implementations • 28 Sep 2020 • Xiu Xu, Andrija Mihoci, Wolfgang Karl Härdle
We account for time-varying parameters in the conditional expectile-based value at risk (EVaR) model.
no code implementations • 25 Sep 2020 • Shi Chen, Cathy Yi-Hsuan Chen, Wolfgang Karl Härdle
Here we provide a first econometric analysis of the CRIX family within a time-series framework.
no code implementations • 25 Sep 2020 • Meng-Jou Lu, Cathy Yi-Hsuan Chen, Wolfgang Karl Härdle
A standard quantitative method to access credit risk employs a factor model based on joint multivariate normal distribution properties.
no code implementations • 25 Sep 2020 • Xinwen Ni, Wolfgang Karl Härdle, Taojun Xie
The movements for both the VCRIX, a market volatility index, and the CRRIX are synchronous, meaning that the CRRIX could be helpful for all participants in the cryptocurrency market.
no code implementations • 24 Sep 2020 • Ben Zhe Wang, Jeffrey Sheen, Stefan Trück, Shih-Kang Chao, Wolfgang Karl Härdle
Monthly disaggregated US data from 1978 to 2016 reveals that exposure to news on inflation and monetary policy helps to explain inflation expectations.
no code implementations • 23 Sep 2020 • Ai Jun Hou, Weining Wang, Cathy Y. H. Chen, Wolfgang Karl Härdle
We show how the proposed pricing mechanism underlines the importance of jumps in cryptocurrency markets.
no code implementations • 22 Sep 2020 • Junni L. Zhang, Wolfgang Karl Härdle, Cathy Y. Chen, Elisabeth Bommes
We find there is significant incremental information in the distilled news flow and the sentiment effect is characterized as an asymmetric, attention-specific and sector-specific response of stock reactions.
no code implementations • 21 Sep 2020 • Simon Trimborn, Wolfgang Karl Härdle
A method relying on the AIC is proposed to quickly react to market changes and therefore enable us to create an index, referred to as CRIX, for the cryptocurrency market.
no code implementations • 21 Sep 2020 • Wolfgang Karl Härdle, Elena Silyakova
The IC surface (ICS) is then approximated from the implied volatilities of stocks and the implied volatility of the basket.
no code implementations • 21 Sep 2020 • Shi Chen, Wolfgang Karl Härdle, Brenda López Cabrera
The network analysis of the full German power derivative market helps us to complement a full picture of system risk, and have a better understanding of the German power market functioning and environment.
no code implementations • 21 Sep 2020 • Sergey Nasekin, Wolfgang Karl Härdle
Extensive econometric analysis of LETF implied volatility process is performed including out-of-sample forecasting based on a semiparametric factor model and uniform confidence bands' study.
no code implementations • 15 Sep 2020 • Marius Lux, Wolfgang Karl Härdle, Stefan Lessmann
The SVR-GARCH-KDE hybrid is compared to standard, exponential and threshold GARCH models coupled with different error distributions.
1 code implementation • 9 Sep 2020 • Alla A. Petukhina, Raphael C. G. Reule, Wolfgang Karl Härdle
This research analyses high-frequency data of the cryptocurrency market in regards to intraday trading patterns related to algorithmic trading and its impact on the European cryptocurrency market.
no code implementations • 9 Sep 2020 • Alla Petukhina, Simon Trimborn, Wolfgang Karl Härdle, Hermann Elendner
Despite striking price volatility, their high average returns have drawn attention to CCs as alternative investment assets for portfolio and risk management.
no code implementations • 29 Jul 2020 • Wolfgang Karl Härdle, Campbell R. Harvey, Raphael C. G. Reule
Cryptocurrency refers to a type of digital asset that uses distributed ledger, or blockchain, technology to enable a secure transaction.
no code implementations • 11 Dec 2019 • Junjie Hu, Wolfgang Karl Härdle, Weiyu Kuo
Cryptocurrency, the most controversial and simultaneously the most interesting asset, has attracted many investors and speculators in recent years.