Trading venues need outside expertise to manage Form ATS-N, Nasdaq says.
New auction methodology replicates block, algo and program trading.
Study reports price discovery improves overall, despite IEX market share.
ATS keeps trading after agreeing to change market data policies.
Canadian regulator alleges data-feed discrepancies and time-stamp issues.
ATS exec says buy side wants blocks, transparency and no HFT.
Small-cap exchange says it is wrongly placed in CAT fee plan.
Agency execution firm snags a block trading network.
Pitfalls aside, buy-side still likes trading off exchange.