By the end of the day, floor brokers were processing orders manually.

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These accounts, used by individual investors, tend to represent great quantities of small orders which take as much processing as big ones.

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On Tuesday, floor traders wound up the day processing orders manually, using paper, pencil and in some cases white board to keep track of buy and sell orders, instead of using the electronic trading system that is supposed to be the show-piece of the hybrid model.

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