Mercury's location in your birth chart influences all of this! Mercury never travels more than 28 degrees from the Sun, so many people will have Mercury in the same zodiac sign as their Sun.
From Monday to Friday, the stock market remains open from 9:30 am to 4:00 pm, EST. PST time is 6:30 am to 1:00 pm.
During the weekday it is closed from 3:15 PM CT for 15 minutes and 4:30 PM CT for 30 minutes, except on Friday. In the case of a holiday it depends on when the holiday occurs if the market is open and its hours. For more CME product hours click here. For CME hoilday schedules click here.