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The minimum tick size applicable to shares and depositary receipts, under RTS 11, is calibrated to the average daily number of transactions (ADNT) on the most liquid market in the EU. While this metric provides a good and simple liquidity indicator for the vast majority of equity instruments, it may not be well suited to third country instruments where the most liquid trading venue is located outside the EU. In these cases, the mandatory tick size may be calculated based on underestimated liquidity and EU trading venues might be subject to minimum tick sizes that are larger than those applicable on non-EU venues.
In this context, ESMA considers it necessary to introduce amendments to RTS 11 to ensure that the tick sizes applicable to third country instruments are adequate and appropriately calibrated. ESMA proposes allowing the relevant NCA for a specific share, with its main pool of liquidity outside the EU, to adjust the average daily number of transactions in order to take into account more comprehensive trading data and ensure that trading in the share is not unduly constrained and does not create disorderly trading conditions. Furthermore, ESMA also proposes a set of conditions governing how NCAs make any adjustments based on numerical evidence of the location of the most liquid trading venue and a threshold for the minimum amount of daily transactions.
Steven Maijoor, Chair, said:
“These specific cases where EU trading venues might be subject to minimum tick sizes larger than those applicable on non-EU venues may have the unintended result of putting EU trading venues at a competitive disadvantage.
“This might result in scarcer and shallower liquidity being available on EU trading venues which can be detrimental to those trading on those venues. This timely consultation looks to address these cases and contributes to orderly financial markets.”
Next steps
Stakeholders are invited to provide feedback on this proposal until 7 September 2018. ESMA, on the basis of the responses received to this CP, will finalise its proposed amendment to RTS 11 and submit a final report to the European Commission for endorsement.