Stocks ended the session mixed after Nordstrom  ( JWN) and J.C. Penney ( JCP) became the latest retail names to report on a weak quarter. Macy's  ( M) and Kohl's  ( KSS) reported quarterly disappointments earlier in the week. The Dow Jones Industrial Average closed lower for the fourth time this week. Crude oil ended roughly flat even after another rise in the number of active oil rigs in the past week. The number of active rigs drilling for crude rose by 9 to 7.12. AstraZeneca  ( AZN) climbed following positive findings for its treatment for patients with locally-advanced non-small cell lung cancer. A clinical study indicated the treatment reduced the risk of progression or death in patients. GlobalStar  ( GSAT) surged on reports the company is contemplating a possible sale. Earlier this week, fellow telecom Straight Path Communications  ( STRP) got a big boost from a bidding war between Verizon  ( VZ) and  AT&T ( T) .

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