no code implementations • 25 Jan 2022 • Giuseppe Brandi, T. Di Matteo
We find that the model is able to reproduce multiscaling features of the prices' time series when a low value of the Hurst exponent is used but it fails to reproduce what the real data say.
no code implementations • 18 Oct 2020 • Ioannis P. Antoniades, Giuseppe Brandi, L. G. Magafas, T. Di Matteo
These GHE patterns, distinguish in a statistically robust way, not only between time periods of uniscaling and multiscaling, but also among different types of multiscaling: symmetric multiscaling (M) and asymmetric multiscaling (A).
no code implementations • 11 Apr 2020 • Giuseppe Brandi, T. Di Matteo
Multilayer networks proved to be suitable in extracting and providing dependency information of different complex systems.
no code implementations • 11 Feb 2020 • Giuseppe Brandi, T. Di Matteo
In particular, in this paper, we propose a parsimonious tensor regression model that retains the intrinsic multidimensional structure of the dataset.
no code implementations • 11 Feb 2020 • Giuseppe Brandi, T. Di Matteo
We show that by using this statistical procedure in combination with the robustly estimated multiscaling exponents, the one year forecasted MSVaR mimics the VaR on the annual data for the majority of the stocks analyzed.
no code implementations • 14 Nov 2019 • Giuseppe Brandi, Ruggero Gramatica, Tiziana Di Matteo
To retrieve the factor components, we propose a new tensor decomposition (which we name Slice-Diagonal Tensor (SDT) factorization) and compare it to the two most used tensor decompositions, the Tucker and the PARAFAC.