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researcher

S. Rachev

26 papers hereh-index 5713.3k citations596 works total

Matching runs newest-first, so older work may not be attached to this profile yet.

author position
  • middle author16
  • last author10

Across the 26 of 26 papers where every author was matched, so the position is known.

fields
  • q-fin.MF7
  • q-fin.PR5
  • econ.EM3
  • econ.GN3
  • math.OC2
  • q-fin.CP2

identity via Semantic Scholar / OpenAlex

activity
20242026
collaborators
Showing econ.EMShow all

3 papers · 1 filter

econ.EM2025

Multivariate Affine GARCH with Heavy Tails: A Unified Framework for Portfolio Optimization and Option Valuation

Ayush Jha, Abootaleb Shirvani, Ali Jaffri +2

This paper develops and estimates a multivariate affine GARCH(1,1) model with Normal Inverse Gaussian innovations that captures time-varying volatility, heavy tails, and dynamic co…

econ.EM2025

Advancing Portfolio Optimization: Adaptive Minimum-Variance Portfolios and Minimum Risk Rate Frameworks

Ayush Jha, Abootaleb Shirvani, Ali Jaffri +2

This study presents the Adaptive Minimum-Variance Portfolio (AMVP) framework and the Adaptive Minimum-Risk Rate (AMRR) metric, innovative tools designed to optimize portfolios dyna…

econ.EM2024

Beyond the Traditional VIX: A Novel Approach to Identifying Uncertainty Shocks in Financial Markets

Ayush Jha, Abootaleb Shirvani, Svetlozar T. Rachev +1

We introduce a new identification strategy for uncertainty shocks to explain macroeconomic volatility in financial markets. The Chicago Board Options Exchange Volatility Index (VIX…

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