reply to post by burdman30ott6
I have heard of them suspending trading or extending it for system irregularities before, but I can't remember the situation.
I will try to search some for precedents.
The New York Stock Exchange said it extended trading until 4.15 p.m. Eastern on Thursday due to system irregularities. The NYSE, which normally ends trading at 4 p.m. Eastern, said it would provide another 15 minutes "in order to settle customer transactions that were affected by systemic irregularities," according to Eric Ryan, a spokesman for the exchange.