Given that the posted article made that comparison and it matches my experience in the industry it seemed ok to &quot;pretend&quot; that electronic market making was a subset of HFT.<p>I understand that these terms are used differently by different people, so maybe you can define what you mean to make it more clear what you think the distinctions are.<p><i>[edit] You&#x27;ve edited your comment since I replied to call me a shill.  Full disclosure, I have worked in HFT and make no secret of it.  I do not currently.</i>