Realty Income Corp. (O) 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 real estate investment trust have returned -4.4%, compared to the Zacks S&P 500 composite's +5.8% change. During this period, the Zacks REIT and Equity Trust - Retail industry, which Realty Income Corp. falls in, has gained 5.4%. The key question now is: What could be the ...