Pragma Securities report says inverted venues don't promote leakage.
Massachusetts joins SEC in examining the way exchanges pay for order flow.
FlexTrade notes the long-awaited pilot may be in limbo or postponed.
The maker-taker pricing scheme is losing favor among traders and brokers.
Nasdaq CEO Backs Lowering Maker-Taker Fees, SEC Pilot Program
Maker-Taker Pilot Likely to be Recommended by EMSAC
Exchange group reports positive feedback on the first reduction implemented in June.