Stocks advanced in quiet volume Friday, as the Nasdaq closed above its 50-day line for the first time since late September. The Nasdaq and the S&P 500 rose 0.7% each. The IBD 50 led with a 1.2% gain. Volume fell across the board. The Nasdaq retook its 50-day moving average, but further testing is likely. The S&P 500 remains just under its 50-day line. Meanwhile, top-rated stocks continue to show strong price-and-volume action.