European stock exchanges hit record volume but rising bank‑owned trades threaten market transparency
Executive summary: European stock exchanges recorded their highest trading activity ever, while banks’ own transactions now exceed 18% of total volume, making the market increasingly opaque. This concentration of proprietary trading raises concerns about fair price discovery and exposes retail investors to greater execution risk, prompting Brussels to examine protective measures. Major European banks, retail investors, stock exchange operators, and European Union regulators in Brussels are the key actors. Brussels may propose transparency rules or limits on bank internalization, market participants could adjust their trading strategies, and new listings such as Digi’s IPO will test the market’s capacity.
The latest data show European bourses at peak activity, yet proprietary trading by banks now accounts for over 18% of all trades, reducing transparency. Brussels is reviewing ways to protect retail investors, which could lead to new limits on internalization or enhanced disclosure rules. While high volumes signal market strength, the growing opacity poses risks to price discovery and investor confidence.
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