MiFID II Waivers And Dark Volume Caps

MiFID II starts from a default: European venues should publish pre-trade bid and offer quotes so everyone can see the market before trading against it. But regulators recognized that forcing every single order to be pre-trade transparent would actually hurt some traders — a pension fund trying to sell a huge block would tip its hand to the whole market before it could even start executing. So the rule allows specific, narrow waivers from pre-trade transparency, rather than a blanket exemption.

The main waivers are: the large-in-scale (LIS) waiver, for orders above a size threshold set per stock, where showing the order pre-trade would create more market impact than it's worth protecting against; the reference price waiver, which lets a venue match orders at a price taken from a transparent venue elsewhere (like the midpoint of the primary exchange's quote) without publishing its own quote; and the negotiated trade waiver, for trades privately arranged between two counterparties at or within the current market price.

Regulators worried that if reference-price and negotiated-trade waivers were used too freely, trading would migrate away from lit markets to the point that the public quotes those waivers depend on would themselves become unreliable — dark trading undermining the very transparency it's supposed to be an exception to. The double volume cap (DVC) addresses this directly: trading under the reference price and negotiated trade waivers in a given stock is capped at 4% of total volume on any single venue and 8% across the EU as a whole, over a rolling 12-month window. Breach either threshold and that waiver is suspended for the stock, for six months, on the venue or market-wide.

Worked example. Stock XYZ trades 8% of its EU volume under the reference price waiver across all venues combined over the past 12 months, hitting the market-wide cap. ESMA suspends the reference price waiver for XYZ across the whole EU for six months — venues can no longer use it for that stock, though the LIS waiver remains available for large orders since it isn't subject to the same cap.