That's a weird article. Nanex of all people is complaining that people are jumping ahead of HFT with negligible price improvements, making the hfts investment in low latency useless.

I mean they pretend its about retail, but the people who lose from subpenny trades are hfts. That's who investor b is, most likely - the fastest HFT.

Personally I believe we should re-decimalize - allow quotes at 0.01 cents. This will induce HFT to focus less on latency and more on price improvement.