Market Extra: Is the U.S. stock market closed on Friday for New Year’s Eve? No. It isn’t even closed on Monday. Here’s why!

Blame it on an obscure rule. For the first time in a decade, there will be no U.S. stock-market closure in observance of New Year’s Day.

Blame it on an obscure rule. For the first time in a decade, there will be no U.S. stock-market closure in observance of New Year’s Day.