(Reuters) - Nasdaq said on Thursday it was halting trading in all Nasdaq-listed shares until further notice due to a problem distributing stock price quotes.
All traffic through Nasdaq stopped at 12:14 p.m. EDT, the exchange said on its website.
"I would not want to speculate other than to say this is huge, everything is halted in the market," said Sal Arnuk, co-manager of trading at Themis Trading in Chatham, New Jersey,
Options trading was also halted, the exchange said.
Nasdaq was not immediately available for comment.
(Reporting by Rodrigo Campos; Editing by Nick Zieminski and Andre Grenon)