Stocks rose but it was a Nasdaq glitch that was the talk of the day. Just after midday, problems with a quote-dissemination system halted the Nasdaq until shortly before the market close. When trading resumed, shares in Nasdaq OMX, which owns the exchange, slumped 3.4%. The Nasdaq composite was up 0.9% when trading was halted; it ended the day up 1.1 %. Encouraging manufacturing data from China and Europe helped stocks advance and break the Dow’s six-day losing streak. August has been hard on stocks as investors fret the Fed is about to start easing back on the stimulus that has helped underpin a 4½-year bull market.