“That was the invisible tax,” said Rob Park. It sounded small until you realized that the average daily volume in the U.S. stock market was $225 billion. The same tax rate applied to that sum came to more than $160 million a day. “It was so insidious because you couldn’t see it,” said Brad. “It happens on such a granular level that even if you tried to line it up and figure it out you wouldn’t be able to do it. People are getting screwed because they can’t imagine a microsecond.”
