Johnson & Johnson (JNJ) 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 world's biggest maker of health care products have returned +1.5%, compared to the Zacks S&P 500 composite's +5% change. During this period, the Zacks Large Cap Pharmaceuticals industry, which Johnson & Johnson falls in, has gained 2.7%. The key question now is: What could ...