The recent decision over the IEX has once again re-ignited debate about speed and its role in today’s electronic traded financial markets. Unfortunately this debate often polarizes people into one of two views – speed is good for markets or speed is bad for markets. This is a little simplistic but does fairly describe the argument and actions of people in their respective camps. I believe we are at a point where we should be re-thinking the role of speed in financial markets. The current mental model is limited and needs to be updated. What follows is a four part blog series where we explore the new role of speed in modern market structure.