# Article 18 — The overall open interest (Article 57(3)(c) of Directive 2014/65/EU) **Commission Delegated Regulation (EU) 2017/591 · superseded — not in force · OJ L 87, 31.3.2017 · dated 1 Dec 2016 [no longer in force]** *No longer in force · Commission Delegated Regulation (EU) 2017/591, OJ L 87, 31.3.2017 · Checked against EUR-Lex on 26 Oct 2026 · [Official source](https://eur-lex.europa.eu/eli/reg_del/2017/591/oj/eng)* 1. Where there is a large volume of overall open interest, competent authorities shall adjust the position limit downwards. 2. Where the open interest is significantly higher than the deliverable supply, competent authorities shall adjust the position limit downwards. 3. Where the open interest is significantly lower than the deliverable supply, competent authorities shall adjust the position limit upwards.