A technical issue affecting securities listed on the Nasdaq Stock Market resulted in stock prices and index levels that appeared frozen in time Thursday afternoon – including the Nasdaq Composite Index, which seemed to linger at 3116.94 for more than 15 minutes, according to data from Nasdaq's website and other market-data sources.

While Nasdaq-listed stocks continued to trade on some exchanges, brokers reported anomalies in the prices of some securities and delays in the reporting of trades to the so-called consolidated tape, the record of securities transactions across all US exchanges.