https://finance.yahoo.com/news/us-stock-market-close-jan-151615994.html I am not from the US, please feel free to share anything about Mr Carter. All I can tell is from recent interviews. He seemed to be a great man.
My memory as a kid in NYC was that he was not popular in the similar vein of Biden. People generally blame those in charge for inflation. There was gasoline rationing and then the blundered capture of the Iranian Hostages. He did replace Arthur Burns with Paul Volker as the Fed chief but fighting inflation would take another 5-6 years so it didn't really help him at the time. I personally liked him. He was a kind of everyman. Peanut farmer turned Nuclear Engineer turned President. I think he was the first engineer to be president since Herbert Hoover (Metallurgy). In hindsight he represented the end of the FDR (Franklin Delano Roosevelt) Democratic Party, although Reagan often referred to himself as an FDR Republican. After 3 consecutive defeats against Reagan & George HW Bush, the Democrats became much more centrist with Bill Clinton as their leader (the end of Big Government as Clinton stated).
The hostages were not Iranian. The hostages were Americans. The capture was not blundered. The Iranians captured the Americans, and they were quite successful in doing so. That is how the Americans became hostages. Did you maybe mean to say that Carter bundered in trying to free the hostages?
No, I think it gets moved to the day before. Or, to put it more accurately: the expiration date will not change. But if there is no trading on the expiration date, then you gotta do whatever you're gonna do before the market closes the day before expiration. Brokers will adjust their schedules accordingly. ITM options will still be automatically exercised unless you instruct otherwise. That's my guess. Haven't had time to try to look it up.
BMK is right, as per this note. https://www.cmegroup.com/media-room...nghoursforusnationaldayofmourningtohonor.html "U.S. equity markets will be open until 8:30 a.m. CT on January 9. All U.S. equity options expiring on January 9 will be moved to expire on January 8."