Trading on the New York Stock Exchanged resumed Wednesday after being halted for about four hours due to “unknown internal technical reasons.”  Internal technical issues are being cited for the reason why NYSE shut down trading at 11:32am EST, which also shut down trading on the NYSE MKT exchange, a market where small companies are traded.

In August 2013 a “Flash Freeze” shut the Nasdaq down for hours, as a “problem with NYSE systems” was blamed.  Today’s is but the fourth trading halt at the NYSE due to technical problems in 15 years.  Stock trading did not cease completely, as NYSE-listed stocks were still being traded on 11 other exchanges, like the Nasdaq. (more…)