The New York Stock Exchange suffered a four-hour technical hitch yesterday, forcing some traders to return to paper.
The problem affected an electronic order management system on the trading floor.
The Exchange said the problem hit its Broker Booth Support System (BBSS), which is an order management system used to transfer data from mobile PDAs on the floor to trading booths.
The system went down just after 10am local time and the system finally came back just after 2pm.
In the meantime, floor traders had to manually process orders and put them through proprietary booth systems.
The Exchange said the technical problems had now been resolved. Other order and processing systems were unaffected.
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