Stocks closed lower Friday and near their lows for the day with the S&P 500 and the Dow Jones industrial average having their first down week in the past eight. For the Nasdaq, it was the second straight down week. In the stock market today, the Nasdaq lost 1.2%, the S&P 500 fell 1.6% and the Dow dropped 1.8%. Volume was higher than the prior day on both exchanges, according to preliminary data.