PLANO, Texas (AP) — J.C. Penney's turnaround is gaining traction.The department store chain said Friday that its losses narrowed in the second quarter on better-expected sales, fueled by men's clothing, fine jewelry and the beauty brand Sephora. And a key revenue measure rose for the third straight quarter.Shares of the company rose nearly 5 percent in afternoon trading."Although there is much work to do ...