Bats Global Markets was forced to shut down its largest US exchange for nearly an hour yesterday because of an internal network issue.
Routing to the BZX exchange was suspended at around 1:00pm local time thanks to "an internal network issue, not a software issue," a spokesman told the Wall Street Journal.
Last year Bats was forced to pull its planned initial public offering after a humiliating technical breakdown on the opening day of trading.
Just an hour after Bats' outage, another US electronic exchange operator, Direct Edge, had its own problem when it briefly had to stop accepting orders on its EDGX platform for stocks with symbols from SPYV to TNC.