(1)

Commission Delegated Regulation (EU) 2017/588 (2) sets out the mandatory tick size regime for shares, depositary receipts and certain exchange-traded funds. In particular, under Delegated Regulation (EU) 2017/588 the minimum tick size applicable to shares and depositary receipts is calibrated on the basis of the average daily number of transactions on the most liquid trading venue in the Union. This metric is a good and simple liquidity indicator for the vast majority of those financial instruments. It is however not suited to shares that are admitted to trading or traded in the Union and a third country concurrently, where the trading venue with the highest turnover in those shares is located outside the Union. In that case, there is a risk that the mandatory tick size, determined on the basis of Union trading volumes alone, will be based only on a small subset of the overall trading volumes. It is therefore important that competent authorities are allowed to adjust the average daily number of transactions for such shares so as to reflect the overall liquidity profile of those shares. In order to alleviate constraints around data availability from third-country trading venues and allow for the possibility to use other public data, it is also important to provide competent authorities with sufficient flexibility as to the methodology used to take into account the liquidity available on those third-country trading venues.

(2)

The mandatory tick size was introduced to harmonise price increments on trading venues in the Union and to preserve market depth, liquidity and the orderly functioning of equity trading in the Union. To achieve those objectives, it is important that information on the adjusted average daily number of transactions used for determining tick sizes applicable to a share is available to all trading venues that offer trading in that share at the same time and that those trading venues start applying any adjusted average daily number of transactions on the same day. To that end, all competent authorities that supervise trading venues where the share concerned is traded should be informed about any adjustments to the average daily number of transactions for that share prior to the publication of those adjustments and trading venues should be given sufficient time to incorporate those adjustments in their systems.

(3)

To ensure legal certainty and predictability of the mandatory tick size regime, it is important that all trading venues apply tick sizes based on the adjusted average daily number of transactions that reflects the overall liquidity at the same time.

(4)

Delegated Regulation (EU) 2017/588 should therefore be amended accordingly.

(5)

This Regulation is based on the draft regulatory technical standards submitted by ESMA to the Commission.

(6)

ESMA has conducted open public consultations on the draft regulatory technical standards on which this Regulation is based, analysed the potential related costs and benefits and requested the opinion of the Securities and Markets Stakeholder Group established in accordance with Article 37 of Regulation (EU) No 1095/2010 of the European Parliament and of the Council (3),