Christmas Day is an annual exchange holiday, a day when US stock venues shut for the full session. It is published by NYSE Group, a subsidiary of Intercontinental Exchange. The group operates New York Stock Exchange markets and issues the closure under its holiday calendar and holiday rule 7.2. Nasdaq, a separate US stock exchange, mirrors the same closure.
It covers whether cash-equity, equity-option and bond markets are open or closed. It measures nothing economic, with no level, change or sentiment score, and bond hours follow a separate schedule.