Before the freeze, the Composite index last stood at 3,940.02. Once it resumed, it rose 3 points to 3,943.
Nasdaq also reported at one point that some options had halted trading because of a lack of index data.
The exchange said the problem stemmed from a data dissemination platform called GIDS 2.0, or Global Index Data Service. It launched in April 2012, according to technical documents on the Nasdaq website.