Stocks sagged on fading volume Friday while the Nasdaq struggled under the dead weight of former leader Apple (AAPL). The Nasdaq lost 0.7%, the S&P 500 0.4% and the NYSE composite 0.1%, The IBD 50 eased less than 0.1%. Volume fell across the board. The Nasdaq kept its losses reasonable for the day and the week, even as it biggest component skidded sharply . Apple, which makes up about 9% of the Nasdaq's weighting, lost 4.4% for the week and 9% the