Shares of Realty Income Corp. O, -1.23% slipped 1.23% to $63.45 Thursday, on what proved to be an all-around dismal trading session for the stock market, with the S&P 500 Index SPX, -1.45% falling 1.45% to 3,822.39 and Dow Jones Industrial Average DJIA , -1.05% falling 1.05% to 33,027.49. Realty Income Corp. closed $11.95 below its 52-week high ($75.40), which the company achieved on April 21st. The stock underperformed when compared to some of its competitors Thursday, as Kimco Realty Corp. KIM, -0.95% fell 0.95% to $20.90, Regency Centers Corp. REG, -0.38% fell 0.38% to $62.27, and Federal Realty Investment Trust FRT, -0.50% fell 0.50% to $101.25. Trading volume (3.2 M) remained 1.1 million below its 50-day average volume of 4.3 M.