The China Securities Regulatory Commission's decision to trial short-selling, as well as margin trading, of mainland stocks is nothing if not perverse in its timing.
The move comes even as authorities from Australia to the U.S. are trying to limit such activity. Certainly, the weekend announcement didn't help stocks Monday: the Shanghai market fell 5.2% alongside a broad sell-off in Asian markets. It has now dropped 65% since its peak last ...

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