BMLL Market Lens: European Liquidity Maps - A Real Economic Interest Viewpoint

The FIX December 2025 standard provides a new public reference for European liquidity: Rather than classifying whether liquidity is addressable or non-addressable, it asks whether trades carry real economic interest or are purely technical and should be excluded from liquidity statistics.

BMLL Trades Plus, and our harmonised data sets allows us to easily look at the EU liquidity map through this lens. 

Only four in every ten euros of European equity trading representing real economic interest happens on a displayed central limit order book. Applied to the Cboe Europe All Companies Index, the FIX December 2025 nested view of interactibility rather than addressability shows multilateral liquidity (real economic interest executed on regulated multilateral platforms) at 53.4% of real economic interest in April 2026, multilateral lit (the subset with public pre-trade transparency) at 46.8%, and multilateral lit excluding frequent batch auctions (the central limit order book of yesteryears) at 40.4%. The half that does not reach a lit book happens at systematic internalisers’ facilities, off-venue OTC, or as negotiated price-forming, and benchmark or portfolio special-condition trades.

Technical records on the reported tape, the NPFT, intra-group, inter-fund and cross-border duplicate prints, have grown from 9.2% of total reported value in May 2025 to 11.2% in May 2026. Reading volume statistics off the unfiltered tape is an increasingly noisy exercise. Because every MMT flag, price-formation indicator and trade-type classification is preserved in BMLL Trades Plus, moving the line between "in scope" and "out of scope" is simple filtering exercise in BMLL Data Lab. The four nested views below are one such filter; a research user can define others.

Figure 1. Real economic interest liquidity landscape across the Cboe Europe All Companies Index. Inner ring: nested liquidity perimeter (real economic interest outside multilateral venues, multilateral non-lit, on-venue frequent batch auctions, on-venue pre-trade-transparent multilateral matching). Outer ring: activity sub-category within each perimeter.

Real economic interest decomposition from least accessible to most

Following the proposed new standard, real economic interest is decomposed in 4 concentric subsets defined by a set of Trades Plus classification plus or mi,us a specific set of flags:

• All trades with real economic interest. The Trades Plus classifications covering every execution a participant could in theory interact with: lit continuous, lit auctions (opening, closing, intraday, unscheduled and auction on demand), dark (below and above LIS, conditional below and above LIS), post-trade uncrossing, closing price, RFQ (below and above LIS), SI Addressable and SI Non Addressable (above and below LIS), OTC, and the reclassified components of off-book-on-exchange. Technical records are removed via the PriceFormation = J flag (NPFT, intra-group housekeeping, inter-fund transfers, cross-border duplicates), and kept only where a qualifying special-condition flag is present (BENC, PORT, CONT, CLSE, NETW, PRIC) or a BMLL benchmark, closing or special-price classification applies, in line with FIX section 2.1 and RTS 1 articles 1, 2 and 6..
• Multilateral liquidity. The subset executed on regulated multilateral platforms available to all participants of that platform. The retained Trades Plus classifications are lit continuous, lit auctions, dark, post-trade uncrossing, auction on demand, closing price where multilateral, and the multilateral price-forming subset of off-book-on-exchange. OTC, SI Addressable, SI Non Addressable, and bilateral negotiated activity are removed.
• Multilateral lit liquidity. The subset with public pre-trade transparency. All dark classifications are removed (below and above LIS, conditional below and above LIS). The classifications retained carry transparent pre-trade prices: lit continuous, qualifying lit auctions, and pre-trade transparent RFQ and trade-at-last mechanisms.
• Multilateral lit liquidity excluding frequent batch auctions. In practice central limit order book excluding periodic auctions. IN BMLL Trades plus that all lit continuous trading, opening and closing auctions.

Which liquidity view is the right reference for a given workflow depends on one’s use case. In BMLL Data Lab a user can easily redefine their liquidity map according to their own vision down to the individual flag level or easily access our classified trades schema for simplicity.

Figure 2. Real economic interest decomposition of European ADV for May 2026. Percentages show each
successive view as a share of real economic interest.

Figure 3. Composition of real economic interest by mutually exclusive chart segment, monthly average daily value. The dotted line shows the share of total reported value that meets the real-economic-interest definition.

Figure 4. Average daily value bridge from multilateral liquidity to multilateral lit liquidity excluding intraday frequent batch auctions. Non-lit multilateral and intraday FBA volumes are shown as the two deductions.

Outside the perimeter: technical and duplicate records

Technical records have grown by more than half over the rolling year, from €5.6bn ADV in May 2025 to €8.7bn in May 2026, with their share of total reported value climbing from 9.2% to 11.2%. These are non-price-forming transactions (NPFT), intra-group housekeeping (IGRP), inter-fund transfers (IFND) and cross-border duplicate reports (XBDT). They are excluded from our liquidity map, both to avoid double-counting and to keep operational transfers out of liquidity statistics.

One subtlety is worth flagging. Some trades carry a "trade not contributing to price discovery" indicator (TNCP, PriceFormation = J) without being technical in the operational sense. Following the carve-out in FIX section 2.1 and RTS 1 articles 1, 2 and 6, these remain inside real economic interest when they also carry a qualifying special-condition flag (BENC, PORT, CONT, CLSE, NETW, PRIC) or when the BMLL classification identifies a benchmark, closing or special-price mechanism. Without a qualifying flag they are classified by their trading mechanism. NPFT-flagged prints (PriceFormation = T), in contrast, are always excluded.

Figure 5. Technical records outside real economic interest (NPFT, duplicate and housekeeping) where identifiable, monthly average daily value. The dotted line shows the share of total reported value classified as technical.

Drill-downs into specific mechanisms

The four sub-sections that follow zoom into specific mechanisms and segments that compose Real economic interest trading. 

Systematic internalisers as a share of Real economic interest trading is trending up.

SI bilateral activity has trended up from a trough of 13% of real economic interest in summer 2025 to 15% in May 2026, with a peak above 17% in February-March 2026. Large in scale trades account for slightly more than half of SI volume in most months of the past year.

Figure 6. Systematic-internaliser bilateral liquidity inside real economic interest, split above and below large-in-scale. The dotted line shows the SI share of real economic interest.

Trading at the close appears seasonal and linked to expiry and reweights as a share of real economic interest.

The close represented 16% of daily real economic interest in May 2026, in the middle of a year-long range of 14-18%, and primary closing auctions still take the overwhelming majority of that volume. Notably as a share of real economic interest the closing auction exhibits a seasonality linked to quarterly expiry and reweights. In March, June, September, and December the closing auction represents up to 18% of real economic interest trading.

Figure 7. The dotted line shows the close share of real economic interest.

Between 40% and 47% of real economic interest ADV sits outside multilateral venues

Negotiated or brought-on-venue price-forming activity is the single largest component of real economic interest outside multilateral venues every month of the rolling year, and roughly twice the size of OTC bilateral and SI bilateral combined in May 2026. Between 40% and 47% of real economic interest sits outside multilateral venues, with the share rising through the first half of 2026. The chart splits this off-venue volume into three activity categories the standard recognises: OTC bilateral, SI bilateral, and negotiated or brought-on-venue price-forming activity. Technical trades are reported separately in figure 5; they are absent here by construction.

Figure 8. Real economic interest outside multilateral venues, monthly ADV. The dotted line shows the off-multilateral share of real economic interest.

Above-large-in-scale activity across mechanisms

Above-LIS volume sat between 8.5% and 10.5% of real economic interest across the rolling year and at 9.8% in May 2026, with SI bilateral above-LIS the largest single component every month.

Figure 9. Above-large-in-scale liquidity inside real economic interest, monthly average daily value by mechanism. The dotted line shows the above-LIS share of real economic interest.

 

Frequently asked questions

What is addressable liquidity?

Addressable liquidity is liquidity that a market participant could in theory interact with. The term has been used loosely in the industry to mean different things to different audiences: wholesale desks have used it to cover the full range of trading activity for a stock, while algo and retail audiences have meant only multilateral platforms reachable by routing. 

What is the FIX December 2025 standard?

The FIX Trading Community’s European Equities Addressable Liquidity: Transparency through Standards, updated December 2025, is a working-group publication that defines four nested views of European equity liquidity and a scenarios table mapping every common trade category to those views. The four views are real economic interest (every print one could in theory interact with, technical records excluded), multilateral liquidity (the subset executed on regulated multilateral platforms available to all participants), multilateral lit liquidity (the multilateral subset with public pre-trade transparency) and multilateral lit excluding frequent batch auctions (the tightest contestable-lit baseline). Sections 2.1 to 2.5 define the views; section 3 maps each MMT and transparency flag to inclusion or exclusion.

What is the difference between multilateral and bilateral liquidity?

Multilateral liquidity is liquidity executed on a regulated platform where, in principle, any platform participant can interact with any other. Lit continuous order books, primary auctions, periodic auction books, transparent RFQ and dark order books operating under reference-price or large-in-scale waivers all qualify. Bilateral liquidity is liquidity executed between two named counterparties, typically under the systematic internaliser regime, an OTC arrangement or a negotiated-trade waiver brought on venue. Bilateral activity is part of real economic interest because someone could in principle have transacted against that flow, but it sits outside the multilateral views because access is conditional on a counterparty relationship. The May 2026 split sits at roughly 54% multilateral and 46% bilateral within real economic interest.

What are frequent batch auctions?

Frequent batch auctions, or FBAs, are auction systems of very short duration triggered by market participants and run at points in time during the trading day, as defined in ESMA’s opinion of the same name. They happen on multilateral liquidity venues and while they meet the pre-trade transparency criteria, they behave differently from continuous order books and from scheduled open and close auctions: liquidity gathers in discrete uncrossings rather than against a posted book. Some workflows treat FBAs as part of the public lit reference and some do not, which is why the standard defines a separate view (multilateral lit excluding frequent batch auctions) that strips them out. The May 2026 difference between the two views is about 6 percentage points of real economic interest.

What are NPFT, XBDT, IGRP and IFND records?

These are the four technical-record categories excluded from our Real eocnomi cinterest viewpoint. NPFT (non-price-forming transaction) is the umbrella post-trade transparency flag for prints that do not contribute to price formation, as set out in Article 2(5) of Commission Delegated Regulation (EU) 2017/590. IGRP and IFND identify intra-group housekeeping trades and inter-fund transfers respectively, both undertaken for operational rather than economic reasons. XBDT identifies cross-border duplicate reports: where the same trade is reported in more than one jurisdiction, one report carries the XBDT flag and is excluded so the trade is counted once. Across the rolling 12 months to 31 May 2026, technical records have grown from 9.2% of total reported European tape value to 11.2%.

How does BMLL classify European trades?

Every print across primary venues, MTFs, periodic auction venues, SI quote streams, OTC venues and APAs is captured into BMLL Trades Plus, deduplicated, harmonised and normalised to a single schema, and tagged with a BMLL trade-type class that describes the execution mechanism. MMT and post-trade transparency flags, the price-formation field and the trade-type class are all preserved, which is what lets the same dataset be cut tand diced to any other viewpoint. The classes group by family.

Lit venue trading. LIT_CONTINUOUS (aggressive removal of a passive order from a lit book during continuous trading), LIT_OPENING_AUCTION, LIT_CLOSING_AUCTION, LIT_INTRADAY_AUCTION (scheduled intraday auction that blocks continuous trading), LIT_UNSCHEDULED_AUCTION (volatility or circuit-breaker auctions), CLOSING_PRICE, POST_TRADE_UNCROSSING (uncrossing concurrent to the primary close, e.g. the Cboe 3C mechanism) and AUCTION_ON_DEMAND (periodic auctions in a separate order book that do not block continuous trading).

Dark trading. DARK_BELOW_LIS and DARK_ABOVE_LIS for non-lit venue trades split by the Large-In-Scale threshold, and DARK_CONDITIONAL_BELOW_LIS and DARK_CONDITIONAL_ABOVE_LIS for conditional dark trades on the same split.

Systematic internalisers. SI_ADDRESSABLE_BELOW_LIS and SI_ADDRESSABLE_ABOVE_LIS for SI trades executed during the primary exchange's continuous hours, when the SI quote is reachable by an electronic router, and SI_NON_ADDRESSABLE_BELOW_LIS and SI_NON_ADDRESSABLE_ABOVE_LIS for SI trades outside those hours.

Other execution mechanisms. REQUEST_FOR_QUOTE_BELOW_LIS and REQUEST_FOR_QUOTE_ABOVE_LIS, OFF_BOOK_ON_EXCHANGE, BENCHMARK_PRICE (e.g. guaranteed VWAP), SPECIAL_PRICE (non-price-forming OTC trades such as dividends and physical delivery) and OTC (vanilla OTC trades).

The lit and dark classes map into multilateral liquidity, with the lit classes also entering the lit views (AUCTION_ON_DEMAND is the frequent-batch-auction class, so it drops out of the lit-excluding-FBA view). SI, OFF_BOOK_ON_EXCHANGE, BENCHMARK_PRICE, SPECIAL_PRICE and OTC sit inside real economic interest but outside the multilateral views.

To produce the liquidity map views we made three changes to the way the BMLL Trade Plus calassificaition works. First, OFF_BOOK_ON_EXCHANGE, which was a single pooled bucket, has been refined to strip out its Special Price and Benchmark Price components, which are now first-class trade types; OBOE in Trades Plus is the residual after those carve-outs. Figure 10 shows the effect: in May 2026, once the carve-outs are applied, around 37% of the legacy OBOE pool maps to OTC and SI bilateral activity, 23% to benchmark and portfolio activity, and 41% to technical non-price-forming records that the views exclude. Second, we apply the price-formation field on top of the trade-type class to decide what stays inside real economic interest: SPECIAL_PRICE and other trades carrying a "trade not contributing to price discovery" indicator (PriceFormation = J) are retained only where a qualifying special-condition flag (BENC, PORT, CONT, CLSE, NETW, PRIC) or a benchmark, closing or special-price class is present, while NPFT prints (PriceFormation = T) are dropped in all cases, following the carve-out in FIX section 2.1 and RTS 1 articles 1, 2 and 6. Third, SI is no longer treated as a single bucket: it is split into addressable and non-addressable, each split above and below LIS, so SI activity can be placed correctly relative to primary continuous hours and the LIS threshold rather than lumped together. A research user who wants the simpler view can collapse these classes back to one bucket in a single line.