[SEC Trading and Markets Division: U.S. Stock Market to Further Move Toward 23×5 Trading Starting December 6] Jamie Selway, head of the SEC Trading and Markets Division, stated that the U.S. stock market data infrastructure is scheduled to expand to 23×5 operations starting December 6, allowing multiple approved exchanges to offer trading during the relevant time periods. Currently, four ATSs are providing overnight trading, and DTCC launched 23×5 stock clearing in June. Further expansion to 24×7 trading is also a possibility in the future.