SAN FRANCISCO Tech stocks were mostly in the red Wednesday, led by losses from Dell Inc. . The PC maker’s shares fell more than 5%, to $ 11.66, after Dell reported mixed second-quarter results and gave a disappointing quarterly and fiscal-year outlook. Dell’s results also kept investors on edge regarding Hewlett-Packard Co.’s quarterly report, due after the market close. H-P’s shares were off by 2%. The Nasdaq Composite Index fell 10 points to 3,057, while the Philadelphia Semiconductor Index gave up 1%.

