Statistical Methods in Finance 2021

June 27 to July 1, 2021, 2-8pm IST


Filtering of comovement networks from high-dimensional data

By Arnab Chakrabarti
Indian Institute of Management, Ahmedabad, India

Network filtering is an important form of dimension reduction to isolate the core constituents of large and interconnected complex systems. We introduce a new technique to filter large dimensional networks arising out of dynamical behavior of the constituent nodes, exploiting their spectral properties. As opposed to the well known network filters that rely on preserving key topological properties of the realized network, our method treats the spectrum as the fundamental object and preserves spectral properties. Applying asymptotic theory for high dimensional data for the filter, we show that it can be tuned to interpolate between zero filtering to maximal filtering that induces sparsity and consistency while having the least spectral distance from a linear shrinkage estimator. We apply our proposed filter to covariance networks constructed from financial data, to extract the key subnetwork embedded in the full sample network.

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Call for Papers in Sankhya B: Special Issue on Recent Advances in Statistical Finance

The aim of this special issue is to feature research papers on theory, methodology, and applications of models and methods for recent advances in statistical finance. We encourage submissions presenting original works on statistical, computational, and mathematical approaches to modelling and analysis of financial data. Innovative applications and case studies in financial statistics are welcome, especially related to novel methodological challenges in the treatment of big data and high-frequency data.

This special issue will bring together contributions from practitioners and researchers working on different aspects of statistical methods in finance, with methodological interests encompassing, but not limited to, the following domains:

The motivating application areas could be: For More Detail ...

If you are a student and want your paper to be considered for student paper competition, then ask your supervisor to send a mail at, with a particular mention that you were the primary contributor and author of the paper by May 15, 2021.

You must submit your paper by May 15, 2021, to be considered for the competition. Mail your paper at

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