In energy ETFs, the United States Oil Fund ( USO ) is up 0.23% to $34.91 and the United States Natural Gas fund ( UNG ) is down 2.4% to $5.29. "The banking sector, mortgages, inflation in emerging markets, deflation here, a mini-currency crisis -- those issues are weighing on everybody's minds." Hewlett-Packard Co. ( HPQ ) launched a tablet computer that runs Microsoft Windows and is targeted at business customers, Reuters reports.