“The world clings to its old mental picture of the stock market because it’s comforting; because it’s so hard to draw a picture of what has replaced it; and because the few people able to draw it for you have no interest in doing so.” That’s the introduction by Michael Lewis in his book Flash Boys on the advent of high frequency algo trading in the US markets. He further mentions that the US stock market is now a class system, rooted in speed, of haves and have-nots. “The haves paid for nanoseconds; the have-nots had no idea that a nanosecond had value.”