From MNI- As SEC listens to HFT and exchanges, Europe drives discussion.

“Trading with HFT per se is not deemed necessarily a bad thing” but
investors want to preserve the choice whether to use it, and which kind
to use and which to avoid. “It’s that element of choice that the
regulators seemed to have taken away without anything being available in
its place.” That, in turn, would threaten to cut into volume even more
and as order volume shrinks volatility increases.

I haven’t flipped my coin on this one yet.