• European exchanges fire latest salvo in market-data fee debate
• Euronext and Nasdaq continue to fight for control of Oslo Børs
• Brexit frustrations persist, as political indecision leaves trading firms and venues stuck in limbo
• Uncertainty over the global spread of EU commission-unbundling rules
• The UK's FCA continues its crackdown on poor transaction-reporting practices
• The spectre of the EU-wide financial transaction tax reappears ahead of the forthcoming European parliamentary elections
• Euroclear shareholders reportedly mull sale or listing strategy