Dunkin' Brands Group (NASDAQ: DNKN) is set to announce its fiscal second-quarter results on July 26. And, unlike the case with industry peers like Starbucks (NASDAQ: SBUX), investors are optimistic that they'll hear news of accelerating sales growth for the coffee and doughnut specialist.Let's take a closer look at the main trends that will determine whether Dunkin' Brands stock continues its market-beating performance.Image source: Getty Images.Continue reading