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.