US Exchanges Prepare to Shuffle Trading Models

US equity trading models will see big changes in the coming weeks as NYSE Euronext won approval from the US Securities and Exchange Commission (SEC) on Sept. 24 to launch block rebates for larger order sizes starting on Oct. 1. Meanwhile, Nasdaq OMX is gearing up to roll out a new price–size model platform.

NYSE Euronext has been operating its NYSE Arca Equities venue on a price–time model, and its NYSE Equities and NYSE Amex Equities venues on a parity system, according to Colin Clark, senior

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