New York, July 3 (BridgeNews) - U.S. stocks closed modestly lower after an abbreviated trading day ahead of the Independence Day holiday. A slew of fresh corporate profit warnings from the technology sector was seen as the major reason for the slight sell-off, although one market watcher noted that the warnings were no real surprise to participants. The Dow industrials were off 28 points at 10,565 and the Nasdaq closed down 10 points at 2138.