Why does EU care about London Stock Exchange's acquisition of Refinitiv?

LSE is now a central node in global and, importantly, European capital markets

Relations between London and Brussels have been better. While Brexit dominates the headlines, another cross-channel development has recently captured the attention of financial institutions. It concerns the the London Stock Exchange’s proposed US$27 billion (£21 billion) acquisition of US financial company Refinitiv, into which the European Commission is carrying out an in-depth anti-trust investigation.

With a ruling due in October, the commission is likely to reject the deal in its current form. To win approval, the LSE recently declared it was selling either the whole of Borsa Italiana or its bond-trading platform,