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.
Trading on the derivatives segment takes place on all days of the week (except Saturdays and Sundays and holidays declared by the Exchange in advance). The market timings of the derivatives segment are: Normal market / Exercise market open time : 09:15 hrs. Normal market close time : 15:30 hrs.