8
$\begingroup$

Does the NYSE provide a list of rules for determining when to close at 1:00 for a holiday? I have found a list of upcoming half-days here but I would like to know the rules so that I don't have to hard-code them in my application.

I found a list of all of the dates on which the NYSE closed early in its history here*. I could discern three rules for half-days that I would like to verify:

  • Thanksgiving: the Friday after Thanksgiving is always a half day (close at 1:00).
  • Christmas: if Dec 24th is a Mon, Tues, Wed, or Thur, close at 1:00.
  • July 4th: if July 4th is a Tues, Wed, or Fri, close at 1:00 on the previous day. If July 4th is a Thur, close at 1:00 on the next day.

The list of upcoming holidays shows that Wednesday, July 3, 2013 is a half-day. This conflicts with what looks like their previous policies. I'm guessing that in the future, July 5th will never be a half-day and that July 3rd will be a half-day if it falls on a Mon, Tues, Wed, or Thur (similar to the Dec 24th rule).

*According to that historic list I linked, the NYSE used to be open on Saturdays. I thought that was interesting.

Improve this question
$\endgroup$
3
  • 2
    $\begingroup$ Rather than hard-coding it into your application, you could have it read from a config file since they publish the schedule ahead of time. Also, if you think you're going to code it and not update it at least once a year you're wrong. $\endgroup$ – Matthew Sep 5 '12 at 15:55
  • $\begingroup$ I shouldn't have said "hard-code". I would probably store those dates in a database somewhere. $\endgroup$ – user1214135 Sep 5 '12 at 16:01
  • $\begingroup$ Any idea on post market hours on these half days? I use this data raw.githubusercontent.com/QuantConnect/Lean/master/Data/… but not sure how to deal with early closes and post market (if any) $\endgroup$ – morleyc Jun 1 at 7:10
2
$\begingroup$

I emailed one of my contacts at NYSE, who replied that there is no rule or policy governing half days (other than that the exchange must be opened for a full day on the last day of the year).

Improve this answer
$\endgroup$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.