A panel of experts has outlined ongoing issues with transparency in Europe at the ICMA annual AGM in London, speaking under the Chatham House rule, which prevents direct attribution.
The first concern they noted is that while transaction data is now being published under the new transparency regime, what feeds into that data remains inconsistent and open to interpretation. Portfolio trades, package trades, and principal basis trades all create ambiguity — a print on the tape may not mean what it appears to mean without the surrounding context. This undermines the reliability of the data and risks misleading investors who lack the nuance to interpret fixed income transactions correctly. As one panellist noted, transparency is not the same as revealing context.
Secondly, for less liquid instruments with only a small number of active participants, real-time or near-real-time disclosure makes it relatively straightforward to identify who is trading and why. This creates a genuine risk of information leakage that disadvantages liquidity providers and investors executing larger strategies — potentially driving activity away from transparent venues or causing participants to fragment trades into smaller sizes to avoid detection.
Third, the current regime is seen as overly complex, with calibration rules that do not always reflect market reality. There is a particular concern about divergence between the UK and EU frameworks, with a call for greater convergence and simplification over time. The treatment of certain derivatives — left to individual venues to decide — is creating an uneven playing field and unnecessary decision-making friction without adding corresponding value.
Even where data is being published, assembling a coherent picture of trading activity from it is proving technically difficult, panellists noted as the fourth point. Pulling information from different APIs, reconciling late prints with earlier versions, and cleaning the resulting dataset is a significant operational burden. The data is not arriving in a form that market participants can immediately and reliably use, which limits its practical value for trading decisions, research, and middle- and back-office functions.
Finally, there is a risk that greater transparency creates a false impression of liquidity that does not actually exist. Investors accustomed to equity markets may interpret bond market data through the wrong lens, expecting that visible prices translate into executable liquidity at those levels. The panel flagged the need to actively manage this expectation gap – particularly as retail participation is encouraged – since the bond market remains structurally more fragmented and relationship-driven than equities, and a print on a screen does not guarantee a tradeable market.
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