This is a cut from Bloomberg's description of NYSE Arca. Anybody clear my confusion: can we trade 8am-8pm or 9:30am-4pm EST? ------------------------------------ Page 3 of 16 NYSE Arca LOCAL EXCHANGE TICKER: UP 115 Sansome Street, 7th Floor 2) Pacific Hours San Francisco, CA 94104 Telephone: 415-954-5500 1) Exchange Web Page March 8, 2006, the ARCHIPELAGO Exchange (ArcaEx) and the Pacific Exchange (PCX) will be renamed "NYSE Arca". Trading hours will be from 8AM-8PM(est) In order to facilitate the expanded trading hours, the NYSE Arca will produce quote and last sale information to SIAC and SIAC will make available quote and last sale information between the hours of 8AM and 8PM. Trades effected before and after the primary markets trading session (9:30AM-4PM) will be marked with a "T" sales connection code. Eligible quotes disseminated before and after the primary markets trading session (9:30AM-4PM) will be included in the national BBO calculations.
You should be able to trade 8am-8pm on ARCA. What in particular were you confused about? The paragraph you sited talked about how they tag the last sales information (with a "T") outside of the primary hours.