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Recursive portfolio selection with decision trees
Andriyashin, Anton (contributor);  … - 2008
A great proportion of stock dynamics can be explained using publicly available information. The relationship between dynamics and public information may be of nonlinear character. In this paper we offer an approach to stock picking by employing so-called decision trees and applying them to XETRA...
Persistent link: https://www.econbiz.de/10003636039
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Investing with cryptocurrencies : a liquidity constrained investment approach
Trimborn, Simon; Li, Mingyang; Härdle, Wolfgang - 2017
management. Since they have a low liquidity compared to traditional assets, one needs to take into account liquidity issues when … one puts them into the same portfolio. We propose use a Liquidity Bounded Risk-return Optimization (LIBRO) approach, which … is a combination of the Markowitz framework under the liquidity constraints. The results show that cryptocurrencies add …
Persistent link: https://www.econbiz.de/10011672439
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Long memory persistence in the factor of Implied volatility dynamics
Härdle, Wolfgang (contributor); Mungo, Julius (contributor) - 2007
The volatility implied by observed market prices as a function of the strike and time to maturity form an Implied Volatility Surface (IVS). Practical applications require reducing the dimension and characterize its dynamics through a small number of factors. Such dimension reduction is...
Persistent link: https://www.econbiz.de/10003633787
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Testing monotonicity of pricing Kernels
Golubev, Yuri (contributor); Härdle, Wolfgang (contributor) - 2008
The behaviour of market agents has always been extensively covered in the literature. Risk averse behaviour, described by von Neumann and Morgenstern (1944) via a concave utility function, is considered to be a cornerstone of classical economics. Agents prefer a fixed profit over uncertain...
Persistent link: https://www.econbiz.de/10003635940
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Value-at-risk and expected shortfall when there is long range dependence
Härdle, Wolfgang (contributor); Mungo, Julius (contributor) - 2008
Empirical studies have shown that a large number of financial asset returns exhibit fat tails and are often characterized by volatility clustering and asymmetry. Also revealed as a stylized fact is Long memory or long range dependence in market volatility, with significant impact on pricing and...
Persistent link: https://www.econbiz.de/10003636008
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Shape invariant modelling pricing kernels and risk aversion
Grith, Maria; Härdle, Wolfgang; Park, Juhyun - 2009
Pricing kernels play a major role in quantifying risk aversion and investors' preferences. Several empirical studies reported that pricing kernels exhibit a common pattern across different markets. Mostly visual inspection and occasionally numerically summarise are used to make comparison. With...
Persistent link: https://www.econbiz.de/10003871796
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Local adaptive multiplicative error models for high-frequency forecasts
Härdle, Wolfgang; Hautsch, Nikolaus; Mihoci, Andrija - 2012
We propose a local adaptive multiplicative error model (MEM) accommodating timevarying parameters. MEM parameters are adaptively estimated based on a sequential testing procedure. A data-driven optimal length of local windows is selected, yielding adaptive forecasts at each point in time....
Persistent link: https://www.econbiz.de/10009526607
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High-dimensional statistical learning techniques for time-varying limit order book networks
Chen, Shi; Härdle, Wolfgang; Schienle, Melanie - 2021
structure of price interdependencies across stocks. For correct empirical network determination of such dynamic liquidity price … bootstrap procedure. We document the importance of LOB liquidity network spillovers even for a small blue-chip NASDAQ portfolio. …
Persistent link: https://www.econbiz.de/10012614016
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Understanding Smart Contracts: Hype or hope?
Zinovyev, Elizaveta; Reule, Raphael C. G.; Härdle, Wolfgang - 2021
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. Introduced in the early 1990's, the technology has...
Persistent link: https://www.econbiz.de/10012504533
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Recursive Portfolio Selection with Decision Trees
Andriyashin, Anton; Härdle, Wolfgang; Timofeev, Roman - Sonderforschungsbereich Ökonomisches Risiko <Berlin> - 2008
A great proportion of stock dynamics can be explained using publicly availableinformation. The relationship between dynamics and public information may be ofnonlinear character. In this paper we offer an approach to stock picking by employing so-called decision trees and applying them to XETRA...
Persistent link: https://www.econbiz.de/10005860747