The S&P 500's return since Election Day has fallen to just around 0.5%. If that holds through Inauguration Day on Jan. 20, it will mark the worst performance for the broad index between an election and inauguration since Barack Obama came into the White House in 2009.

Here's what to know about whether U.S. stock markets will be open on the national day of mourning on Thursday, Jan. 9.

BANGKOK -- World shares were mixed on Thursday after the latest U.S. economic data calmed frazzled nerves on Wall Street.

Global stock markets were mixed on Thursday as Wall Street remained closed to honor the late former President Jimmy Carter. The U.S. stock market was closed Thursday in observance of a National Day of Mourning for Carter who died at the age of 100 late last month.