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# Article 55 — Maintaining sufficient coverage

**Commission Delegated Regulation (EU) No 153/2013 · binding · OJ L 52, 23.2.2013 · dated 19 Dec 2012 [in force]**

*In force · Consolidated version of 7 March 2024 · Verified 9 Nov 2026 · [Official source](https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:02013R0153-20240307)*

1. <a id="art-55-p-1"></a>A CCP shall establish and maintain procedures to recognise changes in market conditions, including increases in volatility or reductions in the liquidity of the financial instruments it clears, so as to promptly adapt calculation of its margin requirement to appropriately account for new market conditions.

2. <a id="art-55-p-2"></a>A CCP shall conduct tests on its haircuts in order to ensure collateral can be liquidated at least at its haircutted value in observed and extreme but plausible market conditions.

3. <a id="art-55-p-3"></a>If a CCP collects margin at a portfolio, as opposed to product level, it shall continuously review and test offsets among products. A CCP shall base such offsets on prudent and economically meaningful methodology that reflects the degree of price dependence between the products. In particular, a CCP shall test how correlations perform during periods of actual and hypothetical severe market conditions.