To paraphrase professor Krishnamurthi [http://www.cs.brown.edu/~sk/ http://www.cs.brown.edu/~sk/] "Just semantics. That’s all there is!" HFTers don't have to j

To paraphrase professor Krishnamurthi [http://www.cs.brown.edu/~sk/ http://www.cs.brown.edu/~sk/] "Just semantics. That’s all there is!" HFTers don't have to justify their existence at all. They exist because they are able to profit and their existence is not against the law. As far ethics and morality, I guess that is what we are arguing here :) Liquidity is not pregnancy, there can be a little of it.