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Francesco Vacirca

5 April 2023
OCCASIONAL PAPER SERIES - No. 314
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Abstract
In this paper we aim to provide a holistic understanding of the Initial Margin (IM) models used by Central Counterparties (CCPs) in Europe. In addition to discussing their relevance in terms of CCP risk management and their importance for the functioning of financial markets, we provide an overview of the main modelling frameworks used, including Standard Portfolio Analysis of Risk (SPAN) and Value at Risk (VaR) models.By leveraging on publicly available data, we provide an up-to-date picture of current modelling practices for specific cleared product classes, as well as various trends in IM modelling practices in Europe. We show how IM model frameworks vary materially, depending on the CCP’s past choices and the products it clears. Despite a propensity to switch to VaR models, idiosyncrasies and differences across CCPs are likely to persist.We conclude by highlighting current and upcoming challenges and risks to CCP IM model frameworks and linking the current status quo with ongoing and upcoming regulatory work at European and international level.
JEL Code
G15 : Financial Economics→General Financial Markets→International Financial Markets
G18 : Financial Economics→General Financial Markets→Government Policy and Regulation
G19 : Financial Economics→General Financial Markets→Other
G23 : Financial Economics→Financial Institutions and Services→Non-bank Financial Institutions, Financial Instruments, Institutional Investors
G28 : Financial Economics→Financial Institutions and Services→Government Policy and Regulation
G32 : Financial Economics→Corporate Finance and Governance→Financing Policy, Financial Risk and Risk Management, Capital and Ownership Structure, Value of Firms, Goodwill
16 November 2022
FINANCIAL STABILITY REVIEW - ARTICLE
Financial Stability Review Issue 2, 2022
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Abstract
Energy sector firms use energy derivatives under different strategies depending on their main area of activity, business model and exposure to risk in physical markets. The significant volatility and skyrocketing prices seen in energy markets since March 2022 have resulted in large margin calls, generating liquidity risks for derivatives users. Strategies employed by companies to alleviate liquidity stress may lead to an accumulation of credit risk for their lenders or their counterparties in less collateralised segments of the derivatives market. Further price increases would accentuate nascent vulnerabilities, creating additional stress in a concentrated market. These issues underline the need to review margining practices and enhance the liquidity preparedness of all market participants to deal with large margin calls.
JEL Code
Q02 : Agricultural and Natural Resource Economics, Environmental and Ecological Economics→General→Global Commodity Markets
G13 : Financial Economics→General Financial Markets→Contingent Pricing, Futures Pricing
G20 : Financial Economics→Financial Institutions and Services→General
17 November 2021
FINANCIAL STABILITY REVIEW - BOX
Financial Stability Review Issue 2, 2021
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Abstract
This box establishes stylised facts about the significant increase in initial margin (IM) in the euro area derivatives market during the March 2020 market turmoil. First, it shows that the increase was concentrated almost entirely in centrally cleared derivatives and driven mainly by equity, credit and interest rate portfolios. Second, by comparing static portfolios with those where portfolio repositioning took place, the IM increase is decomposed into (i) changes attributable to the CCP model sensitivity to market volatility, and (ii) changes attributable to portfolio repositioning by investors. For centrally cleared interest rate and credit derivatives (where this method is applicable), CCP model sensitivity to market volatility is found to be a key driver of the IM increase. Overall, the results suggest that it is important to develop a clearer understanding of “excessive procyclicality” for IM and possibly, on the basis of this common understanding, to review the models which CCPs use to calibrate IMs. The supervisory and regulatory framework governing the liquidity management of market participants, and in particular that of some non-bank financial intermediaries, should also be strengthened.
JEL Code
C60 : Mathematical and Quantitative Methods→Mathematical Methods, Programming Models, Mathematical and Simulation Modeling→General
G10 : Financial Economics→General Financial Markets→General
G13 : Financial Economics→General Financial Markets→Contingent Pricing, Futures Pricing
17 December 2019
WORKING PAPER SERIES - No. 2342
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Abstract
The global nature of derivatives markets, and the presence of large key financial institutions trading in several markets across the globe, call for taking a “macro” view on the interconnections arising in the clearing network. Based on the analysis of derivatives transactions data reported under the EMIR Regulation we reconstruct the network of relationships in the centrally-cleared derivatives market and analyse its topology providing insight into its structural features. The centrally-cleared derivatives network is modelled in the form of a multiplex network where each layer is represented by a derivatives asset class market. In turn, each node represents a single counterparty in that market. On the basis of different centrality measures applied to the collapsed aggregate and to the multiplex network, the critical participants of the euro area centrally-cleared derivatives market are identified and their level of interconnectedness analysed. This paper provides insight on how the collected data pursuant to the EMIR regulation can be used to shed light on the complex network of interrelations underlying the financial markets. It provides indications on structural features of the euro area centrally-cleared derivatives market and discusses policy relevant implications and future applications.
JEL Code
G01 : Financial Economics→General→Financial Crises
G15 : Financial Economics→General Financial Markets→International Financial Markets
G23 : Financial Economics→Financial Institutions and Services→Non-bank Financial Institutions, Financial Instruments, Institutional Investors