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-『qwvwQpmsFFgc』Diana(1/7-07:52)No.18656


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"Though we can clearly see that quotes are sometimes canceled within a millisecond or faster, the data show that the high-speed market is not dominated by such cancellations," she said. "In fact, over a quarter of all exchange-based trades in corporate stocks are executed against orders that have rested for only half a second or less."