Is the Toronto Stock Exchange (TSX) becoming a haven for U.S. and Canadian day traders? A comment on the tipster.ca blog gave pause for thought: “I … momentum trade stocks on the TSX, mostly to avoid the day trade rules of the US,” it went.

Thomson Reuters shares started trading today in Toronto, New York and London. The new company has a dual-listed structure, which means Thomson Reuters will have two parent companies: Thomson Reuters PLC, which trades on the London Stock Exchange (though its ADS is listed on the Nasdaq), and Thomson Reuters Corp., ...