Quote from J-Law:
The Cal-Berkeley professor's claim ( Hendershott ) that the competition between HFTs "lowers the cost for ordinary investors" is just flat out wrong.
How can a crowd of price takers & not price makers improve spreads. HFTs are not sanctioned market makers obligated to make fair/orderly markets & provide liquidity regardless of market conditions. They collectively become a pack/flock/school of hungry mouths that nibble away at whatever is on the book. Collectively their presence will always present a potential destabilizing effect if they all decide to point in the same direction at once, whether long or short. They will only serve to amplify any fundamentally linked or event driven market volatility and result in choppier markets where they wouldnt have been so before. That we know in turn can effect fund manager performance, which in turn affects 401k's & non-trading areas of traditional Wall Street investing. I don't know if this has been mentioned before, but it could also have an effect on option volatilities, which in turn could pump up premiums & thus, creating another distortion.
Also, even if you have just a 1/15 of a second view of a market ahead of 90% of the other market players, it's still an unfair advantage. It's front running regardless what sort of technology you call it. There is no difference between a floor broker taking a few seconds to understand he been handed a big buy order by a clerk, bid it for his own acct & then begin to work the large bid & a computer with a line of code doing the same thing in milliseconds. It's the same unfair advantage only faster.
It's my understanding is that most of the IB's have engaged/invested in this business model to offset losses or increased regulations in other profit centers. So, with that the dance begins between Wall Street & SEC/CFTC. So, get comfortable with them being here b/c that process is slow at best.