ESMA Withdraws Periodic-Auctions Tick-Size Q&A During Equity-Market Review

ESMA said on April 30 that it has repealed the Q&A which had clarified that periodic auctions are subject to the tick-size regime, slipping the update into its broader call for evidence on the structure of European equity markets. The regulator did not package the repeal as a stand-alone policy change, but it is still a notable signal for venues and participants that have watched closely how auctions fit inside Europe’s post-MiFID II market structure.

The same ESMA announcement says the regulator is reviewing how trading has shifted between 2022 and 2025, including movement away from lit continuous trading and toward closing auctions, frequent batch auctions, and systematic internaliser activity. Against that backdrop, removing a specific Q&A on periodic auctions looks less like housekeeping and more like a sign that ESMA wants room to revisit how these mechanisms should be treated.

For traders, the immediate impact is not a new execution rule. But it does matter for the market-design debate around where liquidity forms, how orders interact away from continuous books, and whether venue-specific auction models keep their current advantages.

Why it matters

Periodic auctions have been one of the more closely watched pressure points in European equity market structure. Any change in the regulator’s guidance can influence venue strategy and future transparency or tick-size discussions.

What to watch next

Watch ESMA’s feedback statement in the second half of 2026 for clues on whether the repeal leads to a fuller rewrite of the agency’s position on auctions, tick sizes, or related transparency rules.