Trading stopped around 11:30 a.m. ET due to what the exchange called an “internal technical issue.”
By about 3:15 p.m. ET, the NYSE said “all systems are functioning normally” except the Openbook data feed for the NYSE MKT primary markets. Volume was light after floor trading restarted and closing auctions continued as normal.
The NYSE said all open orders before the halt, including market on close, limit on close and closing offset, were canceled.