The New York Stock Exchange Just Halted Trading and No One Is Sure Why

Screenshot of the New York Stock Exchange status webpage

Trading in all symbols was temporarily halted on the New York Stock Exchange floor Wednesday due to an apparent technical issue.

“NYSE/NYSE MKT has temporarily suspended trading in all symbols. Additional information will follow as soon as possible,” the NYSE said in a statement on its status page.

The exchange was investigating the issue that caused the halt, Reuters reported, citing a source. Trading stopped around 11:30 a.m. ET.

The NYSE said all open orders would be cancelled, according to Reuters. The NYSE is having some sort of technical problem and all trading has been halted.

New York Stock Exchange tells CNBC that they are “working on a major technical issue.” All open orders cancelled. No timetable on reopen.

— Tom Winter (@Tom_Winter) July 8, 2015

The Nasdaq appears to be fine.

Nasdaq systems are operating normally and are trading all symbols including Tape A (NYSE) securities.

— Nasdaq (@NASDAQ) July 8, 2015

UPDATE, 12:18pm ET: Law enforcement officials tell CBS “no indication of any threats”:

UPDATE: At this time there is no indication of any threats against #NYSE, law enforcement source tells CBS News http://t.co/5KkbwyUOwu

— CBSN (@CBSNLive) July 8, 2015

UPDATE 2, 12:34pm ET: NYSE says it’s not “a cyber breach.”

(1 of 3) The issue we are experiencing is an internal technical issue and is not the result of a cyber breach.

— NYSE (@NYSE) July 8, 2015

(2 of 3) We chose to suspend trading on NYSE to avoid problems arising from our technical issue.

— NYSE (@NYSE) July 8, 2015

(3 of 3) NYSE-listed securities continue to trade unaffected on other market centers.

— NYSE (@NYSE) July 8, 2015

UPDATE 3, 1:13pm ET: And answers begin to trickle in…

NYSE told floor traders that problem is related to new software rolled out before trading opened, acc. to trader http://t.co/gPrKzlOWue

— Nathaniel Popper (@nathanielpopper) July 8, 2015

UPDATE 4, 2:10pm ET: The stoppage is almost over.

BREAKING: #NYSE president says market will be open for the close.

— Reuters Top News (@Reuters) July 8, 2015

UPDATE 5, 2:57pm ET: Our national nightmare is almost over…

BREAKING: #NYSE says to begin accepting orders and resume trading at 3:10 pm for NYSE, closing auctions will continue as normal.

— Reuters Top News (@Reuters) July 8, 2015