Phone: +47 55 95 92 94
E-mail:
elizaveta.sizova@nhh.no
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Curriculum Vitae
Banking, Risk Management, Financial Regulation, Financial Markets, Corporate Finance
Bank risk management failures keep challenging regulation relying on internal models for accurate risk assessment. This paper employs unique hand-collected data on banks' internal models to examine how banks use these models to manage risk and why they change models. Exploiting regulatory penalty thresholds, I show that banks strategically relax models, underreporting risk without reducing actual tail risk. I find that capital-saving benefits from adopting less stringent models exceed penalty costs, questioning the traditional trade-off between capital requirements and penalties. Between 2014 and 2019, the largest global banks saved over 12 billion USD in capital through internal model adjustments.Bank risk management failures keep challenging regulation relying on internal models for accurate risk assessment. This paper employs unique hand-collected data on banks' internal models to examine how banks use these models to manage risk and why they change models. Exploiting regulatory penalty thresholds, I show that banks strategically relax models, underreporting risk without reducing actual tail risk. I find that capital-saving benefits from adopting less stringent models exceed penalty costs, questioning the traditional trade-off between capital requirements and penalties. Between 2014 and 2019, the largest global banks saved over 12 billion USD in capital through internal model adjustments.
Strategic Risk-Modelling by Banks: Evidence from Inside the Black Box (with
Mike Mariathasan
and
Ouarda Merrouche)
Revise & Resubmit in The Review of Corporate Finance Studies
Regulators condition bank capital on risk but struggle to measure risk accurately. Capital requirements thus rely heavily on inputs from banks’ internal risk models. Using novel hand-collected data we show that banks’ modelling choices alter the level and accuracy of reported Value-at-Risk (VaR). There are systematic differences in VaR and VaR violations for the chosen simulation method, holding period and historical data size. Hence, banks can get systematically lower capital requirements through their modelling choices. Our findings support the hypothesis of strategic modelling and corroborate recent evidence on banks’ adoption of similar models making the financial system more vulnerable.
Rebalancing of Currency Hedging and the Impact on Exchange Rates (with
Olav Syrstad and Ingebjørg Hansen Sævareid)
We study how currency-hedged investments by non-bank financial institutions (NBFIs) affect exchange rates. When foreign investment values change, NBFIs rebalance their currency hedges, creating systematic FX flows. Using transaction-level data from Norwegian NBFIs, we show that negative portfolio returns trigger domestic currency sales. High-frequency event studies reveal immediate price impacts of 0.2% per 1 billion NOK forward flow. During high volatility, impacts triple. Our findings identify mechanical rebalancing as a key exchange rate driver, particularly relevant for economies with large currency-hedged foreign investments.
Currency Mismatch on Bank Balance Sheets and Exchange Rates (with
Aleksei Oskolkov and
Marcos Sorá)
Liquid Assets: The Effects of Employee Alcohol Consumption on Firm Performance (with
Cédric Huylebroek and
Lars Van Cutsem)
NHH Norwegian School of Economics
Investments
Instructor (Spring 2023, Spring 2024, Spring 2025)
Master's Thesis
Supervisor (Fall 2023 - Fall 2025)
KU Leuven
Master's Thesis
Supervisor of 30 projects (Fall 2017 - Spring 2022)
University of Illinois at Urbana-Champaign
Risk Management Practices and Regulation
Invited Instructor (Fall 2019)
Predictive Analytics
Invited Instructor (Spring 2020)
Illinois Risk Lab
Graduate Supervisor (Spring 2020, Fall 2020)
IRisk Lab Award for the project in Fall 2020 as one of three exceptional IRisk Lab projects in Fall 2019, Spring 2020, Summer 2020, and Fall 2020
Honorable Mention Award for the project in Spring 2020 at the 2020 UIUC Undergraduate Research Symposium
Higher School of Economics
Academic English
Teaching Assistant (Fall 2014)