Electronic trading heads discuss the latest on SEC Rule 606(b)(3), the Consolidated Audit Trail, and more.

Consolidation is a theme in Europe, whereas new exchanges are launching across the Atlantic.

Nasdaq's Phil Mackintosh tells interns all they wanted to know about market structure, but were afraid to ask.

Citigroup and Credit Suisse veteran brings deep experience in electronic trading and market structure.

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SEC's 'Reg NMS II' Plan Assessed

Equity market structure can use a tune-up but no need for an engine overhaul, market participants say.

Markets hold up well amid heavy volume and intense volatility.

Markets hold up well amid 'incredible' volume and volatility.

It may be 2030 before The New Consolidated Data Plan shows up.

The Commission votes to take a CAT-like approach to SIP modernization.

Multiple tick sizes could address a litany of trading woes.