"keeping markets efficient" is how I justified what I did. But what's that number N of market participants where N+1 brings a de minimis improvement in efficien

"keeping markets efficient" is how I justified what I did. But what's that number N of market participants where N+1 brings a de minimis improvement in efficiency. I think the number of market participants (large institutional players) is already well over N. To the point where its just computers churning trades. To be clear, nothing wrong with that. But from a personal perspective you start to question your contribution.