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I'd like to speak to someone about a mortgage <a href=" http://ziplinegear.biz/do-my-assigment/ ">mother tame personal essays for medical school spite universal</a> After a few months working on the 42nd floor of One New York Plaza (at the time the site of Goldman’s main equity trading floor and once the site of the old Salomon Brothers trading floor) Serge came to the conclusion that the best thing they could do with Goldman’s high-frequency-trading platform was to scrap it altogether and build a new one from scratch. His bosses weren’t interested. “The business model of Goldman Sachs was if there is an opportunity to make money right away, let’s do that,” he says. “But if there was something long-term, they weren’t that interested.” Something would change in the stock market (an exchange would introduce a new, complicated rule, for instance), and that change would create an immediate opportunity to make money. “They’d want to do it immediately,” says Serge. “But if you think about it, it’s just patching the existing system, constantly. The existing code base becomes an elephant that’s difficult to maintain.”