Stocks eked out incremental gains in the two-week period ended July 31 as earnings announcements impacted individual stocks and sectors differently. The Dow Jones industrial average rose 0.2 percent while the Valley 50 lost 1.9 percent. The biggest gainer was penny stock MRV Communications Inc., which jumped 20 percent after announcing first-quarter revenue growth. Crown Media Holdings Inc. grew 19 percent after its new TV show delivered strong ratings, and Talon International Inc. gained 18 percent after a strong quarter. CrowdGather Inc. was the biggest loser after its 2013 results and strategic restructuring update failed to impress investors.