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Automated trading

On the morning of July 7, following the terrorist bombings in London, the London Stock Exchange (LSE) asked member firms to turn off all their automated trading systems. The action was in the interest of the continuation of an orderly market, the exchange said. The firms obeyed, and from 11:30am to 3:15pm only manual trading took place.

However, many firms were unhappy about the request, believing that the exchange's action was heavy-handed and made no distinction between the different types