Stocks traded in a tight range Thursday, with low volume pointing to institutional indifference. The Nasdaq and the IBD 50 pegged 0.1% gains each, while the S&P 500 added 0.4%. Volume fell across the board as the market headed into the three-day weekend. The market closes for the Good Friday observance. The S&P 500 failed to retake its 50-day moving average Thursday, but the Nasdaq remained above its 50-day line.