Psoriatic arthritis is a chronic disease characterized by a form of inflammation of the skin (psoriasis) and joints (inflammatory arthritis). Psoriasis is a common skin condition affecting 2% of the Caucasian population in the United States.
Stock Market Holiday Closures. The US stock exchange is open for trading from 9:30AM to 4PM EST Monday through Friday. All major US exchanges adhere to The New York Stock Exchange (NYSE) holiday closing schedules. The NYSE markets are closed and observe the following federal holidays in 2017. Stock markets are closed New Year's Day Jan 2.
While the majority of investors believe that the stock market opens at 9:30 AM and closes at 4:00 PM, there is also pre-market trading and post-market trading hours. The pre-Market hours for stock trading are from 8:00 AM until 9:30 AM Eastern Time, and the After-Market hours are from 4:00 PM until 6:30 PM Eastern Time. The stock market open and close Monday through Friday except on special holidays and may close early for special occasions.