Ah fair enough, in that case I'd agree, but it didn't appear to be what he was saying in the comment I responded to. I've got going on 10 years of HFT experienc

Ah fair enough, in that case I'd agree, but it didn't appear to be what he was saying in the comment I responded to. I've got going on 10 years of HFT experience as a Software Eng / Systems monkey and try to at least set the record straight. If you don't understand simple HFT economics such as Maker/Taker rebates, you have absolutely no business whatsoever commenting on market making firms, especially Virtu, which is fundamentally (until they close their KCG acquisition and do execution for more banks at least) a very large and very sophisticated Designated Market Maker. I'm only responding to you, because you're my fav HN personality and tend to have a lot of interesting things to say at ChiSec :)