Changing the OPR could lead to 'enhanced' regulatory mandates.

Equity market structure item is down to philosophical arguments.

Amex and Arca won't cut prices to gain market share, CEO says.

Don't expect the roll-outs to have a big impact on market share, one industry analyst says.

Less can be more when it comes to trading venues.

Small-cap liquidity has improved slightly, but more work is needed.

What does 2017 have in store for equity market structure?

One technology broker provides preliminary insight into the Tick Pilot program

Market regulator votes on several new EMSAC proposals while getting a term extension.

The buy-side says regulators efforts to fix market structure fall short.