• The field of US stock exchanges expands to 16 with launches by MEMX, MIAX and LTSE
• The ranks of new retail traders get their first taste of choppy markets
• Two big NYSE direct listings could pave the way for more, but the exchange suffers a setback on its plan to allow such listings to raise capital
• Euronext homes in on Borsa Italiana as the EU restarts the antitrust probe that put the Italian exchange up for grabs
• Erstwhile market-structure combatants come together to fend off bigger rivals pushing a financial transaction tax in the New Jersey statehouse
• A federal antitrust official again gins up worries about the government probing exchange data feeds
• Will the SEC bring open access and more transparency to US Treasuries trading by extending Regulation ATS and SCI to cover the giant market?
• Robinhood faces an SEC probe of its order-handling practices
• Financial-services firms look for more ways that artificial intelligence can knit together the remote workplace
• Regulators on both sides of the Atlantic pursue rules that would bring more certainty to cryptocurrency players