The Japanese Stock exchange opens at 9:00 - 15:00 local time (midnight - 6:00AM GMT (UTC)).
Please note, Nikkei is an index, NOT a market, the same as the FSTE 100 in the UK Exchange, or Dow Jones on the NYSE. If you can't tell this fundamental difference, I strongly suggest getting professional adivce on how to invest. Some useful FREE advice can be found from Hargreaves Lansdown (hl.co.uk) and other such firms.
Not to be picky but the Nikkei isn't a stock market. It's an index for the Tokyo Stock Exchange which opens in the morning from 9:00 to 11:00 am and the afternoon from 12:30 to 3:00 pm. This means the first session opens at 4PM PST and closes at 6pm PST. It's not the DOW that opens and closes it's the NYSE.
I was looking online and I believe it is open today.Yes, the stock market is open on Nov11th.
no
The US stock market is closed for Veterans Day.
nope
yes
it opens 5 hours earlier
250
yes
09.15am
no
The trading day for the stock market is any day the stock market is open. On the East Coast of USA, the stock market opens at 9:30 am and 4:00 pm. It is usually open Monday through Friday. However, there are other stock exchanges throughout the world you can exchange with at any time.