BIS's estimates are based on potential losses on a set of hypothetical dealer portfolios that replicate several aspects of the way that derivatives positions are distributed within and across dealer portfolios in practice. The results suggest that major dealers already have sufficient unencumbered assets to meet initial margin requirements, but that some of them may need to increase their cash holdings to meet variation margin calls.
BIS also finds that default funds worth only a small fraction of dealers' equity appear sufficient to protect CCPs against almost all possible losses that could arise from the default of one or more dealers, especially if initial margin requirements take into account the tail risks and time variation in risk of cleared portfolios. Finally, BIS finds that concentrating clearing of OTC derivatives in a single CCP could economise on collateral requirements without undermining the robustness of central clearing.
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© BIS - Bank for International Settlements
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