Some of the biggest winners were mega-cap tech stocks, with Tesla up by 6% while Broadcom, Netflix, and Amazon each gained about 2%.

The kickoff of the “Santa Claus rally” period in Tuesday’s holiday-shortened trading session saw the S&P 500 jump 1.1%, erasing a December decline as it scored a third straight gain and undid damage from a midweek rout last week.

Yes. The New York Stock Exchange and Nasdaq will both operate on half-day schedules, closing at 1 p.m., while bond markets will shut down at 2 p.m., and major U.S. financial markets will stay closed until Thursday’s normal trading session.