no code implementations • 29 Sep 2023 • Christian Bongiorno, Damien Challet
The Average Oracle, a simple and very fast covariance filtering method, is shown to yield superior Sharpe ratios than the current state-of-the-art (and complex) methods, Dynamic Conditional Covariance coupled to Non-Linear Shrinkage (DCC+NLS).
no code implementations • 21 Jun 2022 • Christian Bongiorno, Damien Challet
On the other hand, the asymptotic distribution of Transfer Entropy between two time series is known.
no code implementations • 14 Dec 2021 • Christian Bongiorno, Damien Challet
Portfolio optimization requires sophisticated covariance estimators that are able to filter out estimation noise.
no code implementations • 12 Mar 2021 • Christian Bongiorno, Yulun Zhou, Marta Kryven, David Theurel, Alessandro Rizzo, Paolo Santi, Joshua Tenenbaum, Carlo Ratti
How do pedestrians choose their paths within city street networks?
no code implementations • 10 Mar 2021 • Damien Challet, Christian Bongiorno, Guillaume Pelletier
We apply the knockoff procedure to factor selection in finance.
no code implementations • 18 May 2020 • Christian Bongiorno, Damien Challet
We introduce a $k$-fold boosted version of our Boostrapped Average Hierarchical Clustering cleaning procedure for correlation and covariance matrices.
no code implementations • 30 Jan 2020 • Christian Bongiorno, Damien Challet
We introduce a method to predict which correlation matrix coefficients are likely to change their signs in the future in the high-dimensional regime, i. e. when the number of features is larger than the number of samples per feature.