NextFin News - The Financial Conduct Authority is trying to fix a problem that has dogged London’s equity market for years: even when shares trade, the market often cannot see the full picture. In January, the regulator launched a consultation on a UK equity consolidated tape designed to bring trading data from across venues into one view, improve market participation and make liquidity easier to assess. The stated goal is straightforward. If investors can see a clearer picture of trading volumes and prices, London-listed stocks should look more accessible, easier to trade and more competitive with larger markets, including the United States.
That is an important distinction. The FCA is not saying London lacks transactions. It is saying the market’s fragmented structure makes liquidity harder to measure, and that underestimation can itself become a capital-markets problem. In the regulator’s own words, the current setup can make it challenging for market participants to assess overall liquidity, with the risk that it is underestimated. That matters because visibility affects behaviour. Investors are more willing to commit size to a market when they can see depth, spreads and pricing with confidence. Issuers are more willing to stay when the venue they use appears active, liquid and institutionally credible.
The new push therefore sits at the intersection of policy and market structure. It is part of the FCA’s broader effort to support growth and maintain the UK’s position as a leading global financial centre. But it also reflects a harder truth: London’s share-trading challenge is not only about attracting companies to list. It is about sustaining enough visible secondary-market activity after they arrive. A market can have many listed names and still look thin if trading is spread across multiple venues and the data are not stitched together in a way that shows aggregate depth.
That is why the latest FCA move is best understood as structural, not cyclical. A cyclical story would rest on a temporary lull in risk appetite or a short-term dip in listings. A structural story goes deeper: fragmented market plumbing, persistent comparison with larger US venues and a long-running liquidity discount attached to UK equities. The consolidated tape is designed to address the plumbing, not the macro mood. Whether that is enough is the central question.
What The FCA Is Trying To Change
The FCA’s January consultation says the tape would give investors a more comprehensive and clear view of the market. It would include post-trade data and attributed best bid and offer prices across UK trading venues, with the aim of improving market effectiveness, supporting UK listings and increasing participation. The regulator also said the tape is intended to strengthen international competitiveness by enabling informed comparisons of liquidity with major financial centres, including the US and EU.
That design choice matters. A consolidated tape does not change the number of listed companies overnight. It changes the information set around them. In equity markets, information quality is part of liquidity quality. A share that appears illiquid may attract a wider spread, lower turnover and a steeper valuation discount. By contrast, a market that can show a fuller and cleaner picture of activity can reduce uncertainty for institutional investors, facilitate execution and make it easier for brokers to route orders with confidence.
The FCA’s own rationale makes the mechanism explicit. Simon Walls, the FCA’s interim executive director of markets, said the trading landscape can be great for competition, choice and lower fees, but that it also makes it harder to assess liquidity as a whole. He said the consolidated tape seeks to tackle that challenge by delivering more straightforward access to equity market data from across venues and supporting better decisions and market participation.
“UK markets offer diverse trading options which can be great for competition, choice, and lowering trading fees. But this landscape makes it harder to assess liquidity as a whole in our markets,” Simon Walls said. “The equity consolidated tape seeks to tackle this challenge head on by delivering more straightforward access to equity market data from across venues, supporting better decisions and boosting market participation.”
That is the policy argument in a nutshell. But the economics are more nuanced. A tape can reduce the information wedge between displayed and actual liquidity. It can also lower the cost of searching for liquidity across a fragmented market. Yet none of that guarantees a deeper market if the larger forces pulling capital elsewhere are still intact. London’s challenge has never been just one of transparency. It has also been one of scale, sector mix, valuation and the persistent tendency of growth companies to choose the US when they want the deepest investor base and the broadest analyst coverage.
The FCA is betting that better data can at least improve the odds. It is trying to make London look less like a scatter of venues and more like a single tradable market. In practice, that means lowering the chance that investors underestimate addressable volume and raising the chance that issuers stay because the market’s true depth is more visible. The theory is sound. The question is whether the effect is large enough to matter against the gravitational pull of global capital.
Why This Looks Structural, Not Cyclical
The strongest case for a structural reading is that the FCA’s intervention targets the market’s architecture rather than the business cycle. The regulator is not reacting to a one-off weak quarter. It is proposing a permanent data framework, with the tape aimed to be in operation in 2027 and a planned review after two years of operation. That timeline alone suggests this is meant to be a regime change, not a temporary support measure.
Structural arguments also fit the history of London equity trading. Over time, the market has become more fragmented across lit venues, dark pools and internalised order flow. Fragmentation is not inherently bad. Competition can lower costs and spur innovation. But if fragmentation outruns the market’s ability to aggregate and display data, the resulting opacity can depress perceived liquidity even when the underlying trading interest is healthy. That makes the market look smaller than it is, and small-looking markets struggle to attract the next marginal issuer or the next large institutional mandate.
There is a second structural layer. London’s competition is not another European venue with similar scale. It is primarily the US, where equity markets benefit from a much deeper domestic investor base, stronger growth-equity pipelines and a long-standing culture of using public markets as the default venue for scaling ambitious companies. Those advantages are not going away because London improves its tape. They are embedded in the broader financial ecosystem. That is why the FCA’s plan should be seen as necessary but not sufficient.
The cyclical counter-case is that a lot of the recent weakness in UK equity appetite reflects a broader risk-off environment and a period of lighter issuance. On that view, if the global backdrop improves, London could regain some traction without needing major structural change. That argument is not wrong, but it is incomplete. Risk appetite may influence flows in the short run, yet the same pattern has repeated across multiple cycles: when companies and investors compare venues, the US usually wins on depth and valuation. The persistence of that outcome makes the long-run issue look structural.
The best test is the one the market can actually observe. If the tape works, it should improve displayed depth, narrow spreads and broaden turnover across London-listed shares after implementation. If it does not, then the problem is not just that the market was measuring liquidity badly. The deeper issue would be that investors still prefer the US, even when London’s data are cleaner. That is why the tape is best thought of as a diagnostic and a lubricant, not as a cure.
One way to think about it is that the FCA is trying to remove the fog from a road that is already there. Clearing the fog can improve driving conditions. It does not widen the road. If the road is too narrow for the traffic London wants to carry, the market still faces a capacity problem.
The Second-Order Question: Does Better Transparency Change Capital Allocation?
The first-order effect of a consolidated tape is obvious: better information should make trading more efficient. The second-order effect is the one that matters for London’s future. If investors and companies can see a fuller picture of liquidity, does that change where capital wants to be allocated, or does it simply make a declining market easier to measure?
That distinction is central. Markets often confuse transparency with depth because the two can move together. But they are not the same. Transparency can reduce execution costs, while depth determines whether a market can absorb large orders without meaningfully moving price. If the tape improves the first but not the second, London may look cleaner without becoming meaningfully more attractive. If it improves both, the policy could have a more durable effect on valuations and listings.
The second-order transmission runs through several channels. Better data can reduce the information advantage of a few internalised or off-venue pools. That can improve displayed pricing, which can in turn encourage more order flow to concentrate in visible venues. More visible flow can support tighter spreads and broader broker coverage. Wider coverage can improve valuation confidence for issuers. Better valuations can, at the margin, help keep listed companies in London and support future listings. The chain is plausible. It is also fragile. Each link depends on the previous one being strong enough to change behaviour, not just sentiment.
The main counter-thesis is that London’s problem is not a liquidity-visibility gap but a market-gravity gap. The US benefits from scale, concentration and a much larger equity ecosystem, while London remains a smaller venue with fewer high-growth domestic issuers. On that view, even a perfect consolidated tape cannot overcome the basic fact that global portfolio managers want to be where the broadest liquidity already is. The strongest version of that argument is that information reforms can help at the margin, but they cannot reverse the long-term migration of equity capital toward the US.
That counter-thesis deserves to be taken seriously because it attacks the core of the bullish story. If London’s issue is simply that trading has been mismeasured, then a tape could unlock hidden demand. If, instead, the problem is that London is genuinely smaller and less strategically important to global investors, then the tape may only confirm the market’s relative weakness. The difference is not semantic. It determines whether the policy produces a re-rating or just a better dashboard.
The falsifying signal is clear. If, after the tape is implemented, there is no sustained improvement in displayed depth, no widening in the share of turnover across London-listed equities and no visible narrowing in spreads over the following reporting cycles, then the transparency thesis fails. The market would be telling the FCA that better data are not enough. In that case, the bottleneck would be issuer supply, investor demand and global capital preference, not the quality of market plumbing.
That would not make the policy useless. It would make it smaller than hoped. And in a market like London, those are very different outcomes.
What It Means For Investors, Venues And Issuers
In the short term, the likely beneficiaries are the trading venues, brokers and the most liquid London-listed names. Better data should make execution easier, reduce uncertainty and support more confident routing decisions. Those benefits matter most where orders are large and liquidity fragmentation is most painful. For the biggest stocks, that could mean a modest improvement in tradability and a better case for staying in London.
The companies more exposed are the mid-cap and smaller-cap issuers. They rely more heavily on a credible local market narrative, and they are the names most likely to suffer from a liquidity discount when market depth looks thin. If the tape reveals that liquidity is still concentrated in a narrow set of stocks, the policy may not ease the pressure on these firms to consider alternative venues. It could even sharpen that pressure by making the relative weakness more visible.
Over the medium term, the key question is whether the tape changes behaviour, not just perception. A modest improvement in market participation would be enough to justify the FCA’s argument that fragmentation was obscuring liquidity. But a broader revival of London share trading would require more than transparency. It would need a healthier pipeline of listings, stronger sector breadth, durable research coverage and a valuation environment that rewards public ownership in the UK. The tape can help with the first part. It cannot manufacture the rest.
Over the long term, London’s equity market still faces a choice between being a good place to trade and being a compelling place to raise capital. Those are related, but not identical. A more transparent market can be easier to trade without being more attractive to new issuers. For the FCA, that is the limit of the current push: it can improve market quality and maybe narrow the liquidity discount, but it cannot by itself recreate the scale advantages that make the US so dominant.
The base case is modest rather than dramatic. Better transparency should make London equity trading easier to understand and slightly easier to execute, especially for the largest names. The upside case is that a fuller tape uncovers more liquidity than the market assumed, leading to a mild re-rating in some UK stocks and a stronger case for remaining listed in London. The downside case is that the data simply confirm what the market already suspects: London is transparent enough to see its own weakness, but not deep enough to overcome it.
The FCA is right to treat visibility as a competitiveness issue. But visibility is only half the battle. London does not just need a better mirror. It needs enough traffic to make the reflection matter.
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