Exchange Information The first open, fully electronic stock exchange in the US. Known for its open architecture structure designed to facilitate the best execution for investors. Currently phasing in AMEX, NYSE and PCX listed stocks. More info: http://www.archipelago.com. ArcaEx trading hours are generally between 8:00 am to 8:00 pm Central Time. Please consult ARCAEX for specific commodities and additional listings. Complete list of exchange fees