Sprouts Farmers (SFM) is one of the stocks most watched by Zacks.com visitors lately. So, it might be a good idea to review some of the factors that might affect the near-term performance of the stock.Over the past month, shares of this natural and organic food retailer have returned +23.1%, compared to the Zacks S&P 500 composite's +5% change. During this period, the Zacks Food - Natural Foods Products industry, which Sprouts Farmers falls in, has gained 11.3%. The key question now is: What could be the st ...