The Dow Jones industrial average closed at an all-time high, up 2.81%, or 266.23 points, to 9733.66. Its previous record high was 9643.32, while some of Nasdaqs electronic trading systems faltered today. Nasdaq stopped trades for almost two hours on order-processing systems that normally account for about 20% of its volume. A computer problem forced Nasdaq to shut down at 9:41 a.m. EST its small-order execution system and its SelectNet, used by institutions. It also had to shut down its InterTrade system, or ITS, used for third-market trading. SOES was back online at 11:05 a.m., followed by SelectNet at 11:10 a.m. and ITS at 12:05 p.m. Mike Shokouhi, Nasdaq spokesman, said that during the disruption prices continued to be available and trades could be made. Nasdaqs volume for the day was lower than normal at 821 million shares. Nasdaq closed up 1.93%, or 44.27 points, to 2337.16.The S&P 500 closed up 2.27%, or 28.36 points, to 1275.00. New York Stock Exchange volume was 801 million shares.
All closing numbers are preliminary.