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Byline: DOUG TSURUOKA
Leo Guzman is an investment banker and expert on stock exchanges and indexing.
Guzman's two hats are providing him with a ringside seat on shifts in trading technology on the New York Stock Exchange.
Before 9-11, Guzman notes, all trading orders were sent to the NYSE via an electronic trading system called SuperDot.
SuperDot is a routing system in which NYSE members transmit market and limit orders directly to the exchange.
Using SuperDot, brokers connect to NYSE via a wireline.
But the collapse of the World Trade Center temporarily took out many point-to-point connections of the SuperDot system. This wreaked havoc with trading.