U.S. stocks end second straight week with losses

U.S. stocks ended a holiday-shortened week with losses, as investors grappled with uncertainty hanging over a Greece referendum due on Sunday. The main indexes were little changed on a daily basis, with the trading session muted amid low volumes. The S&P 500 ended 1 point lower at 2,076.27 and recorded a 1.2% loss over the week. The Dow Jones Industrial Average slipped 27.80 points, or 0.2%, to 17,730.11 and fell 1.2% over the week. The Nasdaq Composite closed 3.91 points, or 0.1% lower at 5,009.21 and booked a 1.4% loss over the week.

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