Search Results for author: Christian Bongiorno

Found 7 papers, 0 papers with code

Covariance matrix filtering and portfolio optimisation: the Average Oracle vs Non-Linear Shrinkage and all the variants of DCC-NLS

no code implementations29 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).

Non-linear shrinkage of the price return covariance matrix is far from optimal for portfolio optimisation

no code implementations14 Dec 2021 Christian Bongiorno, Damien Challet

Portfolio optimization requires sophisticated covariance estimators that are able to filter out estimation noise.

Portfolio Optimization

Reactive Global Minimum Variance Portfolios with $k-$BAHC covariance cleaning

no code implementations18 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.

Clustering

Nonparametric sign prediction of high-dimensional correlation matrix coefficients

no code implementations30 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.

Vocal Bursts Intensity Prediction

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