>> new order types that allow firms to sweep liquidity at one exchange only( ie not rout-able orders). > You say that like it's a bad thing. Umm I said no suc

>> new order types that allow firms to sweep liquidity at one exchange only( ie not rout-able orders). > You say that like it's a bad thing. Umm I said no such thing. Please don't make thing up. The order types are useful to market makers and help prevent locked markets, which REG NMS prohibits. I use them every day and I"m not at an HFT firm.