A trading halt on the Nasdaq Stock Market neared an hour after an unexplained technical issue, paralyzing the market for thousands of securities and raising new questions about the robustness of U.S. trading systems following a series of high-profile glitches.
The second-largest U.S. stock exchange expected to resume trading shortly, a person familiar with the matter said just after 1 pm ET . The exchange said in a notice to traders that it wouldn't cancel open orders, but that customers could do so. The exchange would resume trading at a time "to be determined," the notice said.