Stocks still traded in a narrowly mixed range at midafternoon Monday, with the Nasdaq faring best. The tech-heavy index added 0.3%, while the Dow Jones industrial average edged up a fraction. The S&P 500 lost 0.1%. Volume was tracking up slightly from Friday's level for the Nasdaq, but down a little for the NYSE. Chuy's Holdings (CHUY) jumped 7% in big volume to a new high, building on its gains after a recent breakout. Last week, the July IPO