Markets were mixed today, but the Dow closed at its highest end point in 2009 even as tech and material stocks pulled down other indices, the Wall Street Journal reports. The resurgent dollar cut deeply into the commodities sector. A NYSE computer malfunction also temporarily halted trading in some stocks. “Computers break,” one trader said. “But then they replace them.” The Dow was up 28.34 to 8,799.26, the S&P up 1.32 to 946.21, and the Nasdaq down 3.57 to 1,858.80.